male bathing suits reveal FAR more skin and outline the reproductive organs more than do female swim attire - that's far more immodest
Doesnt answer the question, though.
And I voted yes, dont feel like I need to explain why.
I dont swim, but when I do I wear a tshirt. I feel very uncomfortable with the idea of people seeing me without a shirt, I even feel that way about shorts in general : p If I were to be with a woman, Id feel more comfortable with her if she felt the same way : p