If he's only into guys attraction-wise, that would. As porn shows, attraction isn't the only motive to fuck. I've never into chicks but have been in pussy because it's an occasional fetish and depending on other factors, can feel superb. Same with the straight guys who I've been with that only want dick for amazing prostate stimulation and never into the thing attached. Most of us probably stick to toys to avoid confusing people who would call this bisexuality.