I absolutely agree. In fact, I don't see how anyone can observe the body types, the facial features, and the mannerisms of many gays and lesbians and deny that there is a strong genetic component in many cases.
Most of the opponents of the genetic argument seem to be religious people who view homosexuality as a sin that was chosen by the person. To admit that it is genetic would be to admit that God creates homosexuals, which is totally unacceptable in their worldview.
I have lived in SF and Berkely, the "fag" and "dike" capitals of the world. I can assure you that many if not most homosexuals do NOT look abnormal in any way except in ways of their choosing. Many lesbians are entirely normally female in appearance - maybe not dress, but often they are. Same thing for male homosexuals. In fact, many look *ultra* masculine. You are either ill-informed or pushing an agenda.
Also, it is amazing what makeup, hormones, wigs, makeup and other cosmetic effects can do. Homosexual women sometimes take male hormones or have their breasts amputated. This is natural?