Could changes in parenting be part of the reason?
Here are some articles that may suggest that.
2014-10-20-WP-Dvorak-my-sons-love-getting-their-toenails-painted-why-should-that-wig-me-out
My sons love getting their toenails painted.Why should that wig me out?
by Petula Dvoak
Washington Post Opinion Column, 2014-10-20
and seemed to be viewed as avant garde, rather the deviant, there.]