>>> In a lift
Old lifts are best suited for love-making because they have an emergency STOP button. Virtually all new elevators have security cameras. If you spot one --usually placed at the top rear --cover it with a piece of tape. Stop the lift between floors; if the elevator is not level with a floor, the corridor doors cannot open, and outsiders won't be able to open the inner doors easily. You'll get 10 to 15 minutes of confined privacy. Don't drop all your clothes. Use the handrail as a perch to sit on or as a way to get your leg raised to a strategic level. Leave no trace of your activities. Rub off markings (with your clothes) from mirrored walls, if any. Release the STOP button or flip the switch to RUN before the door is ripped open. Exit with a straight face.
Tip: If you find a guard outside, tell him there was a malfunction but no one was harmed.

>>> After a fight
Make-up sex may sound like a bad idea, but researchers and couples insist sex after a fight is particularly hot. It's a good way to convert all that anger into passion. Make a brief closing "anger statement". Give your partner encouragement with your eyes. Say in a suggestive tone of voice, "But we can talk about it another time". The make-up ritual can be as simple as taking a shower together or exchanging shoulder rubs. But no more arguing!
Tip: Pull out all stops; remind him/her what he/she could miss if he/she makes you mad again.