Try Trojan Supra condoms. After trying polyurethane, I can't ever see using latex again. They are much thinner, almost as strong (I asked my sister, an M.D. that works with STDs, and she says the slight difference is insignificant), and the heat and sensation is unreal. I too sometimes have a problem with going soft in the middle of fucking and I don't understand it. The only thing I have chalked it up to is that there is no love or emotion behind the act for me. To actually care for what I'm fucking is foreign to me, as I've never been in love. It's not that I hate the condom. I wouldn't want to not use it. On the rare occasions I've had sex, my sex has been cheaper than my booze, and I've been known to hit the MD 20/20 on occasion. Guess I've been a real skankmonger. Anyhow, go try a box of the Supras and see if they help at all.