Maybe this applies more specifically to conservative women, but I can assure you from experience with older Texas church ladies it does not apply universally to conservative women. They simply have a pretty limited range of opportunities and ways to express their appreciation for the male body, but I've personally heard them commenting.
I just remembered that I had a coworker who said directly to me that she liked checking out guys dicks through their pants. Chef's pants show rather a lot, for loose pants, but I'm sure she had opportunities when she got things out of the deli case for customers. That was only the most extreme case of what I saw working in kitchens. That should cure anyone of the illusion that women always (or even generally) get grossed out by the male body. Go work in a kitchen.
_________________
"I find that the best way [to increase self-confidence] is to lie to yourself about who you are, what you've done, and where you're going." - Richard Ayoade