The act of a man inserting a cheese stick (Preferably Polly-O) into his anus whilst masturbating. The most definitive way of testing ones heterosexuality. If you enjoy this you are gay, and if you have never done this before you are most likely gay.
Marc: I gave myself a cheesectomy and it ended up getting stuck. I had to shit out that Polly-O.
PJ: That's gross I would never do anything like that.
Floyd: Then you're probably gay