I'm currently using [anal lube|link], and it's pretty good for anal (Glass toys mostly), however it's not so great for masturbation (I'm a guy). Does anyone have any suggestions for a lube that will last a long time, and be effective for both?

Also I've been looking at Maximus lube, however there are are a few reviewers that claim it causes burning due to allergic reactions. Is there some way to find out if I'll be allergic to this, before buying it? Like I said I use Anal Lube and have no issues with that. I also have a few lotions with parabens... Are parabens in general what cause the allergic reaction, or is there more to it than that?

Oh, and how long will the lube last (In the bottle)? Years? If I'm gonna spend $18 on a lube I kinda want it to last until I run out (Possibly 5 years or more)