Chemistry 4 is pornumentary about what happens when you put 6 porn stars in a house for 36 hours, give them some cameras, and let them do their thing. No scripts, no rules, and no schedule….just porn stars being porn stars. So is this laziness on the part of the director Tristan Taormino or a stroke of brilliance? It certainly isn’t laziness on her part, because this is an extremely well made video shot in High Definition with high production values, excellent editing and, most importantly, great chemistry between the performers. There is a lot of thought put into this Chemistry 4. I don’t know, however, if I would go so far as to call it brilliant.

Chemistry 4 features Penny Flame, Sinnamon Love, Adrianna Love, Tyler Knight, Johnny Sins, and the highly comic Evan Stone. Every permutation of guy / gal pairings is explored as well as a Sapphic play between the ladies. Interspersed between all the sex that is going on are vignettes with the performers sharing their thoughts on playing with their housemates, sex in general, the porn industry, and how working in the business affects personal relationships. Quite frankly, we could do without the vignettes.

The housemates (and the viewers) are treated to a special appearance by Mark Michaels and Patricia Johnson. This couple specializes in tantric sexual experiences and they give the performers a special session on how to have full-body orgasms. The problem with this is that much of this demonstration focuses on the relationship aspect of tantric sex. This could be very informative to couples watching the film. However, this causes Penny Flame to have a meltdown on camera over how difficult it is for her to enter into meaningful relationships and how the porn industry is her outlet for this pain. While this film is reality-based, this level of reality is just a plain downer.

What we really liked about Chemistry 4 is the spontaneity of the performers and the energy and enthusiasm they bring to their scenes. With the exception of the post tantric let down, everyone seems to be really having fun and enjoying hooking up with one another. Evan Stone is a scene stealer with his hijinks, even going so far as to show up to one of the scenes in a tiger suit…..He’s GREEEEAAAT! The Perv Cam is one of my favorites too. This is the camera that the performers sometimes hold and you get their perspective on the scenes; usually these are much closer and often POV.

Day 1 in the house is on Disc 1. It starts with Evan and Penny getting down to business outside by the pool. This scene features oral both ways and vaginal sex. Evan saves his load for later, but Penny is left visibly satisfied. However, she is not so satisfied that she can’t immediately start playing with Sinnamon with each taking turns with the perv cam while being pleasured by the other’s tongue. The next scene is an orgy on the couch sans Johnny Sins who has not arrived yet. It is a very small couch and the bodies are everywhere in a playful and sexy start to the weekend. Penny finally gets to taste Evan’s load as he pulls out of Adrianna. Tyler plays a while longer with Penny before ending up in the bedroom with Sinnamon where the two have a passionate go at each other. Adrianna shows up in the room and joins in, enjoying Tyler’s tongue as Sinnamon holds the perv cam. She then goes down on him in some very enthusiastic oral sex. The next scene is the afore-mentioned tantric lesson. After the vignettes we find Tyler back with Sinnamon and Adrianna, but this time in the hot tub. Adrianna uses her feet on both Sinnamon and Tyler while Penny films. The four end up back in the bedroom where Penny takes over pleasuring Tyler with her signature handjob move. Meanswhile Adrianna and Sinnamon pleasure each other with toys and tongues. Tyler finally finds his release in Sinnamon’s ass. The final scene of Disc 1 is the welcoming of Johnny Sins by the ladies as Adrianna and Sinnamon descend upon him with their mouths. The action is interrupted by Evan who inexplicably shows up in his tiger suit. Johnny, Evan, Sinnamon, and Adrianna end up back in the bedroom for some playtime which sends everyone off to sleep spent and happy.

Day 2 is on Disc 2. This disc starts, as every new day should, with coffee and good mornings to all. Before long, though, we are treated to Penny Flame pairing up with Johnny Sins. This scene features lots of oral and vaginal sex as well as Penny once again performing her signature handjob move. The next scene starts with Evan shaving his legs in the tub. Adrianna shows up and cleans up has ass for him (HOT!) which quickly turns to a rimjob that is all too short. The scene continues in shower with Adrianna sucking Evan’s cock (with a bit more rimming) and finishes up in bedroom where there is even more oral, rimming, some vaginal, and even some anal. As a bonus Penny is in the corner getting herself off with a Hitachi Wand. The scene ends with Adrianna licking Evans ass as strokes himself to orgasm. The third and final scene of Disc 2 has the rest of the ‘cast’ joining Evan and Adrianna in bed for an all out orgy. The orgy starts with Sinnamon inserting an NJoy Pure Plug 2.0 into Adrianna’s ass and quickly heats up from there. In the interest of space, I will save the play by play. Suffice it to say, everyone is involved and, except for guys on guys, it all happens.

Special Features:
Bonus scene featuring Sinnamon Love and Tyler Knight featuring an OhMiBod music driven vibrator, lots of oral, some vaginal sex and an internal cumshot. There is a bit of dialogues at the end from each performer as well from which is clear they truly have chemistry.
Position Room where you can pick the scene by your favorite positions.
Also included is a photo gallery, ‘The Women of Chemistry,’ and ‘The Men of Chemistry, as well as some trailers for the other videos in the series and Tristan’s SexEd videos, Vivid product advertisements, and ‘More Adult Fun.’
Deleted scenes which are just more of the same and worth a watch. There is some fantastic footage of Adrianna Nicole going down on Johnny Sins while Sinnamon is shooting with the perv cam. The other real gem here is Evan Stone and Sinnamon making his cock into a puppet.

Overall we enjoyed this film. I do wish Tristan had skipped some of the vignettes. The scenes, however, a very good, the sex is real, and the performers are certainly having fun. Chemistry 4 is very watchable and sure to excite.

Honestly we haven't watched this after the original review. The memory of vignettes and the Penny Flame meltdown is enough of turn off to have us reach for something else in our library.