Spray tans are good for a quick fix.. They don't last long, they only look decent for 3-4 days then go patchy, so you have to exfoliate to get rid of the patches.. About lifting your boobs up, I'm not sure.. You don't have to go naked, I go in a G string just because I like the tan line.. And no the lady wont giggle at you.. I am sure she will be professional and would have seen many body shapes and sizes... Hope I have helped a bit..