I'm all for avoiding sexist jokes and comments, but I can't really see what's wrong with this.
Are we becoming so puritanical we can't even admit that a male person is attracted to a "naked beautiful woman"?
Are we becoming so puritanical we can't even admit that a male person is attracted to a "naked beautiful woman"?
If one were male and the other were female, the joke wouldn't work.
If both were female it wouldn't work, as (if you're male like me) you're aware of our inherent and unfortunate sexism (our rational brain shuts down upon viewing an attractive female).
The difference between sexism and acceptable behaviour is knowing this limitation of our selves and acting respectfully with the other sex.
Edit: typo