{Haha, no worries!
In all seriousness, Bill’s interests are … pretty much clean. Sure, he’s a scalie, but he’s part of that huge chunk of the furry fandom that … pretty much has no interest in the subculture’s dirtier sides.
But to get a little further into it, Bill’s (sex-positive) ace(/panromantic) but curious. As in, he doesn’t really have actual fetishes, but he’s pretty much willing to try a lot of things, just because it’s in his nature to ask questions and experiment with everything if it’s brought up to him. So you could literally tell him, “Hey, how do you feel about being handcuffed to a pole while I drip hot candle wax on you, and by the way, you’ll need to wear this rubber mask of Professor Oak while I’m dressed as Delia Ketchum,” and his response would probably be, “I have no idea why that would be pleasurable, and I actually sort of want to find out now.”
Or in other words, Bill’s not really into anything, but you could still probably get him to do anything. Within reason. Like, he won’t do it if it’s very clearly illegal. Or extremely dangerous. In that order.
But as a casual thing to do with partners? Nah, if anything at all, Bill much prefers just, you know. Vanilla stuff. Although he’d very much prefer just taking Netflix and chill literally, if we’re honest.}