Yeah, I have the exact same problem. I think part of it might have to do with how constrictive they are. I mean, they're pretty tight, and it's essentially squeezing all the blood out of my dick. Maybe I should try slightly bigger ones, but they only seem to come in one size. Plus, by the time we get around to the point where I need to put on a condom, I've been standing at attention so long it's harder for me to stay there. My girlfriend is going to be going on birth control pills in a few weeks, but not solely because of my problem. Sex without accessories is just a whole lot sexier, for both of us.