Not embarrassing (not really disgusting either), but i can regurgitate at will.
Also i can stop pissing mid-stream ( or i used to be able to last time i tried).
Do i have special muscles ?
No - HELL no. I was making a joke.
Stopping your active piss stream is near Herculean, though. You must have something "Special" going on. I have to pinch it off, if I need to stop and that hurts !!!
I've seen lots of people Sell The Buick on cue. I can't. I can't even fool myself by manipulating my gag areas with my fingers. It's kind of like trying to tickle my own ribs. It doesn't work.