Once upon a time, wearing a one-piece bathing suit meant slipping into a swimsuit that was completely utilitarian. Meaning, it covered as much as possible to keep everything in place while swimming in the beach or pool and was usually somewhat unflattering. But those days are gone. Now, you can find actually sexy swimwear in one-piece for women that are a far cry from their clunky predecessors. They’re a tad bit more sophisticated than your average two-piece bikini, without giving up the sex appeal. And of course the men sexy swimwear don't stay behind.