Once You Go Terran, You Never Go Back: a Protoss person discovers how good oral is when they hook up with a Terran for the first time.
Protoss 1: "Humans are soooo primitive. They have mouths! They use their orifices for talking!" Protoss 2: "...And eating." Protoss 1: "Yeah, eating." *shudder* "Wait, why are you blushing?"