A few you don't want to hear during sex:
"Would it help if I got out and pushed?"
"You said you wanted to be around when I made a mistake; well, this could be it, sweetheart."
"Good. I hate long waits."
"Your father wanted you to have this when you were old enough."
"Sorry, sweetheart. We haven't got time for anything else."
"Here goes nothing."
Quotes that might be good to hear:
"You may fire when ready."
"Impressive . . . most impressive."
Ones that could go either way:
"She may not look like much, but she's got it where it counts, kid."
"You do have your moments. Not many of them, but you do have them."
Ones you don't to overhear later:
"You came in that thing? You're braver than I thought."
"I thought that hairy beast would be the end of me."