I'm pre-T and I never pass unless I put on mascara facial hair, haha. It takes a lot of time to do so I only really do it if I plan on being outside for an extended period or want to "look good."
I have a feminine body shape (wide hips, big butt) so I get "ma'am"d all the time. When I put the make-up on, it either confuses people too much to risk gendering me, or I do get called "sir" or "dude."
The most recent time I passed, I was at a club and I was wearing my mascara facial hair and shorts that show off my particularly furry legs (for being pre-T). It was crowded, so when people tapped me to get by, they would say, "Excuse me, sir." It was nice.
But then the very next night at the grocery store, sans "facial hair," I was ma'am'd. It was obnoxious. I really can't wait to start T.