Empaulio; When your sure the situation is right lie your partner on their back, and, whilst lying between their legs, engage in a long sensuous tonguing of them (Cock/pussy), really making them the focus of a lot of tongue work all over them and take the chance to bury your face a little deeper between the legs for a langruous stroke of your tongue between their legs, (it's at this point you can have a sly sniff to make sure there are no unpleasant odours or anything to put you off- if so continue as above). If everything seems ok and they're into the idea, lift their legs onto your shoulders, this will lift their pelvis exposing their butt. when you feel ready dive in, treat the whole area to the same gentle strokes of your tongue as you did their cock/pussy till your comfortable with concentrating solely on the anus itself... you might like to spread their cheeks to get closer, then let your imagination take control....
As for the return, it is always a bad idea to do something in the hope it WILL be returned, but you can hope your technique and satisfaction insppire them to try
