I'm surprised like one person has brought up what was obvious to me-the Visser is just too serious to let something like that get to him. Like Estelore said; you can igonore basic urges and reactions if you have enough mental and behavioral self control and single-mindedness as the visser. Ax is a teenager who can allow himself to be silly as a human-the whole duty/fight thing, I think, is sorta put on the backburner when he's in human morph, 'cause he never fights as a human anyway.