Sure, any history of psychology book is going to discuss Freud's influence, his psychoanalytical theories. The problem is that pretty much all modern psychologists rejects Freudian psychology as essentially defunct pseudo-science. That's not to say the guy was an idiot or even a bad psychologist, but that relating psychological gestures as literal manifestations of highly symbolic relationships is, at best, just not how anyone on the planet actually develops their personality.
Unless you're willing to go the whole nine yards and begin diagnosing homosexuals on the phrenological quality of their head lumps, I'd say Freud's psychology has had its day, but is unlikely to accurately describe anyone.
Well, sure, there's a connection between alcohol and testosterone. You've already retracted the statement where you connect alcoholism to homosexuality -- I suppose there's evidence for that claim, but what does that have to do with the fluidity of sexuality?