Quote from Chandler in The One with the Blind Dates
Monica: Unless maybe we do it here. I mean, how much can she even be aware of at this age? Chandler: Well, she's aware when we leave a room. She may notice if we start canoodling in it. Monica: Canoodling? Chandler: Well, I can't say hump or screw in front of the B-A-B-Y.