Nearly every man I have known (excluding my dad/brothers as it would be wrong to know this about them) has done the following:
1) When just out the shower with towel round them, have pelvic thurst (either with the towel still on or not) so thier knobs flop up and down/windmill style
2) stick thier knobs between thier legs and pretend they are a woman and find it hilarious... seriously, do you know how unattractive you look whilst doing that?