Absolutely hysterical...but I can't remember where I stole it from

How to improve your gaydar: You walk down a busy street and look for a really hot guy walking the same direction as you .... you follow him ...( the next bit is the tricky part) instead of focussing on him , pay attention to the guys coming the other way, watch out for the ones whose eyes do a quick flick as he walks past (if they turn around for a second look as he passes all the better) try this for a few weeks and your gaydar will improve ( although you may walk into a few lampposts/rubbish bins/ sandwich boards along the way) .