What was the reason for Reggie's desire for Joan?
One of the things that struck me about the early episodes was Reggie's obsession with Joan. His wife seemed a really attractive, kind, loving woman (he could have done MUCH worse) and still desired him, because we saw in one episode that he failed to 'perform'.
I can imagine Reggie wanting an affair with his secretary if his wife was some ghastly hag, but she wasn't.
Was it just boredom and tedium with the whole 'niceness' of his life?
'Monsters? We're British!'