A variety of sources over a long period of time. Usually, I've been using the information for theological discussions both with people more fundamentalist and more liberal than myself. Since the relationship between sexual activism and traditional morality is such a salient cultural issue, I prefer to keep informed.
But if you think... the same is true for heterosexual relationships. Male sexuality is more of a physical phenomenon. Males are aroused by physical features and acts. There have been a ton of "I'd hit it" threats started by males in this forum.
While certainly most women are physically attracted to men, females are aroused by romance, by emotional connection, by having their heartfelt needs met.
This actually has an evolutionary basis. Males who have sex with multiple partners increase their chances of reproducing.
Since females are the ones who get pregnant and have to raise the child, they increase their chances of successful reproduction if they select partners who will stick around and care for the child.
sexuality has an evolutionary basis too, but only in terms of an entire population, since clearly sexual individuals are unlikely to reproduce.
Eh? No, I don't want to sleep with Sheryl Swoopes. But, I wouldn't be surprised if in the event she were to leave the world of basketball following retirement she were to leave her lesbian partner and revert to a heterosexual relationship.