Oh. That's the guy that Watanuki said he definitely didn't have sex with.

[Shadow frowns at the memory though -- watching as the other man aged while Watanuki stayed the same... and then one day he was gone. Shadow hasn't had to deal with that yet... but in the pit of his stomach, he dreads it]

... I guess I'll have to make some sort of decision here, after all.

[completely unrelated to sex and/or not sex with watanuki thanks]