I have managed to maintain an errection while being screwed to untold limits however it requires a man who knows what he is doing and my having an unbearable lust for him--without those two requirements it becomes just plain sex for the hell of it. Ray was able to keep me going of course he had a few extra tricks up his sleeve including a grab of my penis and my testacle (see earlier postings for the explaination on where the other one went) and some nipple tweaking action along with a belly rub (I'm not weird, I'm just easy to excite). In the past couple of months only one guy has managed to keep me going and I ejaculated before he had finished. Sadly he then went home to his wife and kids in another town so there has not been a repeat performance.
On the other side--where I have been on top (I'm flexible, if it's for sex I don't get caught up in the dynamics of who is top and who is bottom, he calls the shots and I go with it. I said flexible, I did not say Slut), when on top and driving into the other man it has usually been a matter of their losing the erection rather fast and staying wilted for the remainder, some have ejaculated but with most it has been a before and after deal--I give them a b/j before and then again after. Again, I am am flexible and willing to please--I am not a sex crazed slut of a man.