So I've never owned a Speedo before but need to buy one now that I'm training at an aquatics center. (I have a square cut suit, but am the only one on my team without a Speedo, so I guess I should make the plunge.) Any advice on how to select one that fits properly? Hell, are you even allowed to try them on without underwear?? Any Speedo newbie pitfalls to avoid? Any suggestions here or by PM by the pros would be appreciated. Thanks!