I would like to point out that this tangent started when Goku1992A said, "At some point heterosexuality is a vital necessity." Which is when Seliph objected and said not really. Seliph is absolutely correct to say not really as, heterosexuality is defined as "The quality or characteristic of being sexually attracted solely to people of the opposite sex." Note how no part of the definition describes procreation. A sperm and an egg are needed for procreation, but no one has to be straight for that to happen.
Biologically speaking, the heterosexual sperm is attracted to the heterosexual egg. Or maybe the egg just snatches it with its tentacles.
You need a female and a male to make babies. That's hetero. That's sex. That's heterosex-uality.
this is still a method for gay couples to have their own kids
Lol, it's a method for gay couples to have someone else's kids. If they want to program a genome and pretend that there is no sexuality involved, then they are still kidding themselves.