When selecting a toilet to use, it is man rule not to use the middle stall and respect your fellow shitter's space. Violation of this rule, especially when other stalls are available, means you love the cock.
Guy #1: Dude, that chinese buffet went right through me. I gotta drop off the kids.
Guy #2: Looks like you're gonna have to wait. The end toilets are taken and all that's left is the gay stall.
Guy #1: FUCK THAT! I'll sneak into the ladies' room.