Huh? New Vegas has huge amounts of gay stuff. There's literally an entire perk designed around the Courier being flirtatious with the same sex and a minor "quest line" (it's not REALLY a quest but more just dialogue the player can look into) that covers how homosexuals are treated in various factions. It's even an openly shared understanding that the Legion's soldiers have sex with each other constantly despite the Legion's rules against homosexuality.

Meanwhile, there's just one Mormon guy with a gun.