Serbian Sauna

The only non-gay way to jerk off another man: you have your hand on your dick, and another man shakes your arm up and down

"Dude, the craziest thing ever happened to me! I was on an airplane and I had my hand on my dick, and this guy reached over and yanked my arm up and down! Is that gay?"

"Nah, man, that's just a Serbian Sauna."