Buck up boys. If you fall asleep or doze off in any way, oyu're screwed, unless you've paid the lady (shame on you, me). It's embarrassing, insulting, you can choke the girl to death, she can stab you and steal your kidneys, she can rob you, you'll get laughed at, the list goes on and on. Don't fall asleep. Grow a pair, flick them, take the pain and keep the sex going.