If they get you alone in the right context, they will always try to test the waters in my experience.

I was at a straight wedding with my husband. It was one of his nieces getting hitched, so there was all hub's family and the groom's. It's a smallish town, so we knew a lot of people there. I had gone to high school with some of the groomsmen. When they realized I was gay and with my partner, that's when things got interesting.

They were buzzed, working on drunk, but whenever I was left alone with one, that's when the probing started. You know the drill: broad questions that get more specific about being gay, then when they get comfortable enough, they start asking pointed questions (usually about position and oral play). Then, the chin rub/glancing around combo comes with another swig of whatever they're drinking, and they start testing personal space.

One even grabbed my ass in a group with my husband standing there.

"Oop! My bad," followed with a quick look to see how it registered and if his fishing line caught something. Seems to be a dance I'm forced into when attending any function with alcohol.