Aaron, I was wondering if you were familiar with the work of William and Barbara Mouser with their Five Aspects curriculum on sexuality. (fiveaspects.com) If not, it would be worth your time to review their engagement with the meaning of masculinity and femininity. They have the thick anthropology that you’re seeking, and they can enunciate what masculinity and femininity are for, even for singles. Their work has depth and insight and is worth checking out.