I know, but I just ship them. Bisexuality is very common and I think it has never been said he was exclusively gay.
It happens that heterosexual characters have been rewritten as bisexual. Willow, in Btvs, was in a heterosexual relationship for 3 seasons before she got a girlfriend. And most people enjoyed it
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"I thought you wanted food," she gasped.
"I do," he murmured, tugging on the bodice of her dress. "But I want you more." Julia Quinn. Romancing Mister Bridgeton