my girlfriend and i have been together for about 4 months, and have had non-penetrative sex for about 2. Having sorted out the contraceptive side of things we decided to start making love, something in which she is very inexperienced but I am not. Whilst there was never a problem until this point with maintaining an erection, I now find that I'm losing it most of the time before I penetrate her. She is being very kind and says not to worry, but quite honestly it is difficult not to - especially as I've been sexually active for over 20 years and never had this problem before. I'm 38, a light smoker and drinker and in relatively decent shape. This partner is in every way my ideal woman - physically and mentally - and I've finally found someone who makes me really happy after years of misery with exes!