75. Teddy Pendergrass "Turn Off the Lights" (1979)
Not only is this a super-sexy song, destined to put you and your lover in the mood, sure to set endorphins in motion, guaranteed to seal the deal... but it's also ecologically thoughtful. Please turn off the lights. Please unplug your computer when you're about to make love. Please keep the air conditioner at 78 degrees when you're getting it on. Please don't run a half-full dish washer when you're feeling freaky.