This is anectdotal, but I have lived across the street from a homo male, who was living with a female, with kids. My wife had a outed gay supervisor, who had once had a wife and child. Happens all the time. Oh, yeah, just remembered a female lesbian that I used to work with, and she had an ex hubby and chillun.
So you know of 2 gays who either lived with a woman or were married and so it "happens all the time"?
How is that anecdotal evidence that closeted gays with HIV/AIDS are infecting their wives?
"female lesbian" is redundant, and off-topic.
Sometimes people become attracted to the same sex. Doesn't mean they always were. You can get used to anything. It took me weeks to be able to smoke cigarettes without extreme nausea when I was 12 or 13. Watch enough weird movies, get accosted by homosexuals, think about it - and voila! A new one.