I'm a big guy. Generally don't do selfies for this reason exactly. It's not from one or a small group of individuals, either. I get this as a first reaction from a dozen sources a day, even strangers. I can't smile anymore.
So what's something that Flips your switch and will make you sub out every time? Me personally face sitting will do it every time. And for Dommes out there, what's your favorite way of establishing yourself over your subs?