So...I bought one from TYR in a size 36M.

How are swimsuits supposed to fit? Snug? Tight? It felt rather tight. When I went to the store to try on the 38L, it felt the same as the M. I usually wear a size M (or between 8-10) with normal clothes, and cycling shorts and jerseys I am also a M.

Do they loosen up in the water?