I've never said (or had someone else say) something that "ruined the moment". More like I said something to help me escape the terrible thing my boyfriend at the time considered "sex". I just couldn't take him flopping around and moaning like a zombie anymore, so I said "I have to go to the bathroom!" got up and ran away.

For me, most talking "ruins the moment".

The worst I know of is from a friend with one of her boyfriends (right in the middle of sex) was "Go get me a drink of water."

I think my worst was "I have to go to the john." (At that point in time, I didn't know about the G-spot.)

The worst I heard was from my ex-husband during one of our rare make-out episodes: "Why are you always faking??" Apparently, making out once a year was more than enough, and it hardly went anywhere because he didn't believe women could be vocal and hence accused me of faking my pleasure.

I have said "wow your butt is really sweaty."

He surprisingly kept going, lol.

I am the queen of random mood killing phrases during sex.

The only thing that comes to mind is one night we had on a new porn (mostly as background), and right in the middle of fucking my husband stopped and said, "Holy shit - look at that!" So, of course, I did, and what was on the screen was unbelievable. We probably spent 15 minutes watching, trying to figure out if it could possibly be real (think Jason in Friday the 13th parody - it was that big). That pretty well killed it for a while

These are funny!

One of my exes, right in the middle of sex one time, started happily comparing me to her ex-boyfriend... Although from her comments it would appear I was doing a far better job than he ever did, I was not in the least bit thrilled when she began requesting that I do certain things the way he used to that apparently she used to enjoy greatly.

If she had asked me to do so without ever bringing up her ex I would have happily complied. The ex being mentioned and me being compared to said ex and her talking about me wearing a strap-on were the nails in the coffin.

Biggest mood killer ever for me is to bring up an ex.

Another ex of mine used to talk about her best friend randomly and at times right before we became intimate. I later found out she was still in love with her best friend. After that little confession any time she mentioned her best friend I was instantly turned off. Needless to say we didn't last much longer after that little tidbit came to light.

My ex boyfriend and I hooked up in my car on New Years, I thought it was just gonna be quick and easy for the moment but he wanted to get all into it. He came out with all sexy-voiced, "baby you think you're fertile and ovulating?"... All I could do to reply was giggle and fake having a cramp in my hip to make it stop. Oddest thing I could have ever thought he'd say.

I really can't think of anything that's ever been said mid-sex-act that's turned me off, or been "worst."

Really, the only thing I can think of at all is the once when my (monogamous LDR boyfriend, reunited for a weekend) and I were cuddling up in bed, and I was trying to get him to share some fantasies or new ideas to try with me. After painful minutes upon minutes of "no, that doesn't really sound very hot," I asked "what about X?" and he said,

"Yeah actually I had thought about that before but I didn't want to bring it up in case you had already done it with someone else."

Maybe this wouldn't bother some people? But I'm usually pretty even-keeled and easy-going, and hard to offend, but I definitely curled up into a noncommunicative ball for a few hours after that.

I think it was the combination of implied sluttiness (in the sex-negative sense) (he never came to terms with my sexual history despite my honesty and then willingness to drop it/not bring up stories, and had said things like "Well I worry that, you're, you know,... a slut" before), and also the fact that after me trying to get a fantasy, any fantasy out of him for months, it turned out that he did have fantasies and just didn't feel comfortable sharing them with me.

Kinda devastating.

Im tiered i dont wanna go anymore. was about the worst thing ive been told. lol.

I'm bumping this old discussion back up, because I was just about to post something really similar.

When I was 15, I actually had a boyfriend who in the middle of a blow job told me I was going to have to stop before he accidentally called out another girl's name.