Ha, that made me laugh out loud. I will take each and every one of these suggestions as gospel and act accordingly, obviously feeding back with the most successful.
Imagine I'm walking the dog, spot a dude walking towards me, we glance at each other's bulges and give the secret sign, next minute, we're in the bushes having a mutual wank.
Do any of you chaps know, if there is a cheeky sign to let dudes know you are up for a bit of cock fun when out in public?