this may or may not be the name of the game in question, but i asked about a specific title, and nobody seems to know of one. anyway...
the basic premise of this particular game is to hold your hand over an unsuspecting (or indeed, suspecting victims head and count, be it out loud or in your head. you are counting the number of girlfriends they have, if they are a gent, or boyfriends if they are a lady. the only way to stop you counting is for them to put their hand over their own mouth, at which point you reveal the number of partners they have. the critical thing here is, the more partners of the opposite sex they have, THE GAYER THEY ARE. you can occasionally get lucky and get a victim who doesn't know the game, enabling your count to reach truly astronomical proportions, and making them the gayest person EVER. but if they don't know the game, then they probably don't care. this game is still played in the north east.