Hey, thanks a lot for all the tips, I never though about tiring my guy out, but now that I think about it, I definately have! Sometimes he just wants to lie around on the couch, which is a good thing for a tired guy but I am all frisky and waiting!
Anyway, good pointers and I'll be sure to keep track of his performance and feelings - Maybe I'll ask him too if he feels like "no sex today" - lol!