Openly gay Ellen DeGeneres (No. 10) has brought lesbianism to the mainstream with massive platforms on TV, Twitter and Facebook.

FORBES: Diversity On The Forbes Power Women List

Though this should be of no more than passing interest, Ms. di Florio repeatedly flirts with the question of lesbianism without providing the answer.

NEWYORKER: Speaking in Strings

This, combined with the trivial observation that not all lesbians have twin brothers, suggests that if male hormones are inducing lesbianism, they are coming from elsewhere.

ECONOMIST: Homosexuality

In 1885, a bill amended by Henry Labouchere, a Liberal member of parliament, criminalized all male homosexual acts (lesbianism was not illegal) making Britain the least hospitable place for gay men in Europe.

FORBES: 'Downton Abbey' Review: The Curious Incident Of The Valet In The Night