Your post is right on. ;)
Thanks.
A couple notes: Yes, I goofed and referred simply to "heterosexuals" in the context of male heterosexuality. Female heterosexuals are less turned on by observing female sexuality, of course.
There is also another distinction, too: In breast-feeding, a child learns to associate affection with meeting physical needs (i.e., hunger). For women, this comes from another woman. For men, this comes from a member of the opposite sex. Hence, it is also natural for heterosexual and presexual women to be much more comfortable expressing affection with members of their own gender. The affection can be sometimes confused with sexuality, even when there is no sexual drive. Hence, the phenomenon of "lipstick lesbianism."
In college, I was an all-too-safe male in a Catholic University with a conservative student body (read: significant numbers of students trying to remain chaste while learning their sexuality), and poor spiritual formation (read: Jesuit), in a sex-drenched age. There were things I witnessed about female sexuality which should never be witnessed.