When tappin' a bootay, dig your talons into the sides of her voluptuous glutes. As you thrust your man-bird-piece into her snatch, begin to screech like a bird of prey and flap your arms as if you could fly. (feathers optional)
Bob: "I've always wanted to disprove laws or gravity, or become the new evolution of man"
Marquis: "Yo, why don't you kill two birds with one stone (so to speak), call up Sally, and Hawkman that ho until yo feet leave the ground."
First, set up a miniature "grave" in a sandy beach for your sexual partner to lie in. Proceed to cover your partner's entire body, excluding the genitalia and face. Wait for your partner to fall asleep. When the moment is right begin to fornicate with your partner, appearing to onlookers that you are merely sexing the sand.
Bob: "So I hear you're bringing Natasha on a date to the beach tonight!"