i'd say "go with what's contextually appropriate." smile a lot, laugh, make mildly mean observations about the people around you, tell safe but amusing stories.
"what comes natural," on the other hand, could lead to hilarity, at least if this advice was supplied to one of lovelorn-gaf.
--
"Hey," said don't_call_me_leia26.
"Hey," said Kung Fu Grip. "Well, uhhhh."
"Heh heh," she said.
PANICKING HERE! thought Kung Fu Grip. WHAT DID THAT GIRL ON THE INTERNET SAY, DO WHAT COMES NATURALLY? THAT.
"I want to explore all of your orifices!" he blurted, and then stared at his feet.
He didn't look up until he heard the sound of sirens.