After sex I don't feel tired, in fact it does the opposite I wake up and get super hyper, I just want to do stuff. Well a friend and I were talking and he goes "then you're doing it wrong" and I said "Um no I've been told I'm amazing in bed" (not bragging but 4 out of 6 have told me, even the ones where it didn't end well--yes I have had orgasms) so I'm just curious does everyone just get tired or do you get hyper too?