Yes, most definitely. It is an ongoing western culture dominated phenomenon that can be empirically measured.
We can thank Margaret Saenger, in part, for the Pill, as one of the most influential individuals in the 20th Century, that made this possible.
The rise of "David Bowie", "Boy George" and others in the 70's and 80's also led a cultural revolution of greater acceptance of androgyny.
However, a more interesting phenomenon is happening in some countries, like Japan where young people are losing interest in physical relationships with others, all together.
South Korea, which was once dominated by a machismo culture, is now a world leader in male cosmetics.
It appears that when there are population pressures and limits to high protein diets, a result can be lower limits of sexual dimorphism. One sees that in India, where population pressures are among the highest.
The Pill, technology, and other modern factors puts a new spin on what may result in the future, if Japan is any indication.