True. He may have drawn Magi-Chan's hideous, spiny duck and licked it, and will - perhaps tellingly, occasionally - talk about his fantastic 'rolls in the hay' with Magi-Chan and Mewtwo, but he really isn't interested in men sexually. It's all a part of his near-constant lying to himself. The Idea Guys implanted the idea, sure, but he's never gone out of his way to reinforce anything sexual between himself and the male components of his 'marriage'. A lot of nauseating use of 'hubby' and the occasional awkward slow dance, but never detail about anything more physical, unlike his nauseatingly graphic if clueless descriptions of heterosexual sex - if he had any sense, he'd cut his losses and declare his 'marriage' a purely Platonic relationship. Chris will pretend to be a proud supporter of LGBT, but show him even the most perfect cock on the planet for real and he'd run screaming.
TL, DR - you're right. He's a dirty brute male and, however hard he tries to convince himself otherwise, he's straight.