Of course it turns him red with embarrassment, gets a ducked head, breaks the confident he has built up over the past couple months so he blurts out a flustered, "No, of course not, you don't seem like either—" and if he weren't inclined to agree with her suggestion already, the possibility of offending her would have made him insist, "Yes, of course, you may call me whatever you like."

A much simpler problem to handle.