If your just about to slip your soldier up a tasty hoe but cant quite get hard, fold your dick in half, The crease will trap what blood is in there and it will be stiff enough to push up.
You wont hit the back, but she'll think shes playing with a wideboy!
After a few minutes your bodies natural hormone levels will rise enough so that you can get hard. Pull out, fold out and bust a lung!
Job done, disaster avoided.
Friend 2: Yeah man, but i had drank far too much, so i hit her with the half way house, whuppah!
Friend 1: you the man.