I don't think the concept of parasites causing homosexuality is taken very seriously by anyone. I'm not sure how or why homosexuality happens, it just does. There are probably a lot of factors and not just one. The promiscuity issue is odd, it has never really suited me and I have not had any comfort with people that sleep around with strangers. Frankly, it seems mastubatory but with far more risk.
I don't think the concept of parasites causing homosexuality is taken very seriously by anyone. I'm not sure how or why homosexuality happens, it just does. There are probably a lot of factors and not just one. The promiscuity issue is odd, it has never really suited me and I have not had any comfort with people that sleep around with strangers. Frankly, it seems mastubatory but with far more risk.