I'm sure Bunter gets more walks in the park than are mentioned in the books - after all, he needs to keep his, um, hand in for chatting up parlourmaids.

I don't know if it will ever get written down, but ever since I read your infernal comment, Helen has been banging on at me about that impossible manservant of Peter's and how marital ardour fades with time and really, it's relief that Gerald finds other outlets for his energies these days and what a disappointment it is that her daughter didn't inherit Gerald's good looks
whereas St George, who's got them, doesn't actually need them, and she's seen Bunter winking at the housemaid and that girl is going to have to go and... I wish she'd shut up.