If trying a bathing suit on, definitely yes. Otherwise it depends on the suit and your level of modesty. Most men's suits have a mesh "undergarment" and women's suits are designed to wear without underwear.
Wear underwear!! :D
You should not wear a bathing suit i would wear Jeans shoes and a hollister t-shirt
While regular underwear isn't a 100% safe, effective barrier against germs, it does definitely provide protection. One should never try on a bathing suit without their underwear on, and should never wear a new swim suit before washing it.
You should wear a bathing suit and take some sponges.
If your nipples are showing through your bathing suit now, I definitely think it's time you should a bathing suit with padding
What you should wear will depend on where you are going. If you are going to the beach, a bathing suit is appropriate. However, if you are going to a formal even with the President, A suit and tie or a dress is what you should wear.
you should wear a black top or a plade shirt.
You can surf with just a bathing suit on, or you can get a wet suit, the wet suits keep you warmer, but if you just get a well fitting bathing suit that doesn't fall down that should be just fine.
I wear my thong underwear outside and in the house, with a t-shirt, I do wear a thong bathing suit at the beach, I usually don't get hassled by anyone at the beach. I make sure I have another bikini type bathing suit to change into if there are alot of children around, it's just common sence.
You have to wear a bathing suit
yes, if your aboy
bathing suit, or nothing if you please.