A naked person won't give me any reason to think twice about it. I find this a rather interesting contrast to my brother who was once quoted as saying that there was no situation in which a man and woman could be naked and it wouldn't be sexual. To me, that seems flawed, since people never would have been productive enough to get anything done before we, as a species, learned to make clothes, if they were constantly horny just from looking at each other. Same goes for tropical tribes / cultures / etc, who still don't wear full clothing.
Sexual nudity... well, I don't care about that, either, but that's for different reasons. I actually find someone wearing nice looking clothes / outfits
far infinitely more interesting than anything someone does while he / she is naked.
Needless to say, the general attitude of my... "fellow" Americans, that seeing someone naked is virtually akin to an invitation for sexual intercourse blared over a loudspeaker, is virtually incomprehensible.