What kind of earrings are "sexy" earrings to you (or to the average guy)?

The adult store I work at stocks a small selection of clip-on earrings for our TG/CD clients, but since that supplier also has a huge selection of cheap/seasonal pierced earrings, we're thinking about creating a display up front for our regular toy, shoe, novelty, and lingerie customers. (We're very female-focused, the store is mostly women's and unisex/couple toys with some masturbators &c., 1.75 of our 2 biggest walls is lingerie, and we have one DVD wall on the back, so the earrings fit in with the "everything you need for date night" selection of stockings, clubwear, stripper shoes, and makeup.)
Since we're not so far in the middle of nowhere that I'd expect our customers to view us as the primary source for earrings, so I'm thinking we'd just do "sexy" earrings and jewelry? But (since I personally have very particular taste in earrings which doesn't realy) I'm not sure what the average woman wears when she's trying to look sexy, or (probably more importantly) what the average guy wants to see his woman wear on a date or in the bedroom. Any suggestions or ideas? Do you like seeing long and dangly, or short and unmoving? Sparkly with lots of gems and crystals, or mostly metal? Pearls? Specific colors of gems, prefer gold or silver, ?? Anything else you can tell me about what's likely to appeal to people shopping for stuff to wear during sexy time?
Ladies who also be here, what's your opinions? What makes you feel pretty and beautiful? What should I watch out for, what's gone wrong for you in the past? I know nickel sensitivity is a common concern, but this supplier is pretty cheap stuff, that we're probably gonna price at about Target-ish prices, $7.95-$16.95, so it's unlikely that we can really carry any nickel-free options... Just anything that you can tell me about your mindset when you're looking at earrings in the sex store lol.
Thanks, y'all.