i've had sex a few times, however nearly all those times i was a bit drunk. not plastered, maybe a little bit past tipsy. so now i recently had sex w. a girl and during foreplay i could not get up. i was scared and the only reason for this i could think of was because i was tired most of the day and couldn't get up because of this however after a whileee i finally got up and wen we started going at it i lasted only a few minutes! while the other times i went on for a while. does being tired before sex have any effect at all??:ugh plz reply, thx.