Your proof that being gay is not normal?There are plenty of Homosexual bakers out there- there really is no reason for people intent on Gay Marriage to insist that Christians bake a cake for them.
The only reason I see is that the Homos want to "stick it" in the eye of Normative Americans who are offended by this bastardization.
BTW, if I was a baker, I'd have no problem with baking a cake for this kind of silliness. I'd still think it was stupid, but I liked Jim Carey in drag as Vera De Milo back in the day.