while sucking cock, make sure you don't gag
while wedging cock deep down vaginas (or throats) don't say: "oh it's in there pretty deep!" cuz it's freaky and anoying and ewwwww... you could just say: "you like that, baby, do you?" or "just keep moaning as i shove my dick inside your bitch vagina"
while taking of your underpants in front of a naked babe, don't loose your cool.
if you haven't shaved your balls clean it can be really embarasing while having sex.
after you cum while your dick is inside a vagina, pull it out and rub the dick against it for a while.