Alcohol causes homosexuality?

Well.  Maybe.  In fruit flies.  (Pun/slur not intended. Really.)
Science Daily[*1] :

Among the team’s discoveries is that male fruit flies, which typically court females, also actively court males when they are given a daily dose of ethanol. “We identified three molecules that are crucial for “ethanol-induced courtship disinhibition,” Han said.

Another reason not to drink a six-pack a day.  Or, maybe a reason to drink that six-pack every day.  I’m trying to be open-minded and diversity-oriented, here.

And, anyone who’s spent much time in a bar knows all about “ethanol-induced courtship disinhibition.”  This, of course usually but does not always result in being “shot down,” which is a major factor in “disappointment-induced ethanol disinhibition”.