I have some ideas of ways to turn interactions with them into seduction, based on observation(I've never tried one but I've always felt like I could), want people's thoughts. She hands you a sample and then you;
-Walk off studying the packet like a Rubix Cube, when she wants to "ask you a question", you keep your back to her and turn your head over your shoulder. Answer the question in a way that implies you're a filthy bum(I never wash my hands/face/etc., you have to actually be immaculately clean), cut her off like you're busy, and if she tries hard enough to get your attention after that you walk up and say, close to her face with heavy eye contact that you'd love to talk lotion/oils/etc. with her but not here or now, #close and walk off. (I did everything except the close and I heard her from the other side of the mall)
Or you accept her demonstration and;
-Immediately give her the "strip club rules" speech, "no kissing, no touchy touchy between the legs". Keep banter playful and light, buy nothing or bargain heavily to get a decent price if you can, then either #close or instadate to food court.
-Go through demonstration tickling her hands/wrist back with your fingers, heavy eye contact, comments like "this lotion is nice but I'm more interested in your hair care. It looks strong, pullable"(maybe too sexual for the mall? Or maybe you do give a little pull?). When she goes to sell you tell her you blew everything on something sexy(silk underwear/sheets, Dom Perignon, etc., you should actually have at least one set/copy of it). Then having claimed brokeness ask her to buy you lunch/dinner/drinks.