the original purpose of sex is procreation.
I think the main purpose of sex is pro-creation, but I wouldn't label it as the original purpose.
we must recognize that it is a disability
I'm curious; how is being gay or lesbian a disability? Personally I define a "disability" as something that obviously constricts a person's level of functioning. However, being gay or lesbian is a sexual orientation. I don't see how it impairs a person?
Anyways, if it is indeed a disability, should all gays and lesbians be permitted to apply for disability pensions?
RE: Gays and lesbians and sex. It seems that one of the implications here is that being homosexual = promiscuous. IMO I think that is a rather outdated stereotype, albeit an enduring one.
Personally, I don't see how sexual urges between gay/straight males, or gay/straight females would be any different. Besides, if people are easily distracted by their urges, then I would seriously doubt they are fit for service.
To the best of my understanding, being in the military means being professional - which means you leave personal feelings at the door when on duty. Sexual orientation doesn't matter.