Try drawing anatomically correct male animal characters and get back to me on that. For that matter, one could argue not drawing them anatomically correct is a form of concealing. Then again, most child dolls (Barbie and Ken) aren't formed as anatomically correct.
I'd tend to argue the real truth is more obvious: you accept a person or character as they are from the start if you don't perceive their appearance as intended to be provocative. When they change appearance is when you wonder if their intention is provocative. Hence, there is more room to making characters provocative with clothing. To achieve the same without clothes involves in some fashion changing the art style, and that'll get detractors of a whole other kind.