I never wear bikinis for the reason that I am not comfortable wearing one. But to other women out there who have something to flaunt, then go for it. There is nothing wrong with wearing bikinis, to be frank. The only thing that I deem inappropriate about it is when they are too revealing. Sometimes, it depends on the situation as well. Just like Paige said, if you are around guys, then it is more appropriate to wear something conservative. Even when in public, again I think you should not wear something that revealing. Unless you want to earn some snide remarks from total strangers. I am not sure about the latter, but coming from quite a conservative country and a religious family background, that is kind of intolerable.