Did you know that a man has an erection just about every 90 minutes? (unless of course you're incapable of erections in the first place) Why you ask? It's got something to do with keeping the bloodflow and other things healthy and functioning.
So if you go flacid in the heat of the moment, just tell her to stand by for another functions check. Or you can time it just right so that the functions check coincides with your moment of entry.
I'm not trying to make fun of you or the subject. I just had to get this useless fact out of my head and on paper. *Close enough*
- P
