Before revision: Scientific evidence Although there is not yet complete understanding of the causes of sexual orientation , the evidence supporting biological causes is much stronger than that supporting social factors, and there is little or no evidence supporting the theory that homosexuality can be acquired through sexual contact with homosexual adults.
After revision: Scientific evidence There is not yet complete understanding of the causes of sexual orientation , the evidence supporting biological causes is much stronger than that supporting social factors, and there is little or no evidence supporting the theory that homosexuality can be acquired through sexual contact with homosexual adults.