I guess I'm challenging the assumption of the article - that homosexual men are inherently more promiscuous than heterosexual men. Go into any bar on a weekend night, and you will find innumerable guys who would love to go home with just about any reasonable looking girl they could find. The fact that relatively few do is not a function of them being more moral in some way than homosexuals, but that women are much more cautious and picky than guys.
If girls were as willing as guys, I believe you'd find the same rates of promiscuity among hetero- and homosexual men.
I didn't see where the article made that assumption.
The article merely pointed out the fact that gay men are more promiscuous. It also pointed out the fact that homosexual men in committed relationships are more promiscuous than heterosexual men in committed relationships.
Now, you might speculate that single heterosexual men would be just as promiscuous as homosexual men given the opportunity, but that just illustrates how our society would degrade if we were to accept and approve of heterosexual anonymous, immoral, hedonistic, casual sex -- just as we're being asked to accept and approve of homosexual anonymous, immoral, hedonistic, casual sex.
Women are the stabilizing and settling force in our society.