Spy v. Spy

Have the girls have become so uninteresting that we instead have to listen to the Professor muse to himself that he feels like a teenager and doesn't want to be careful [with his heart]? ....yes.

One thing that's always interesing: the background characters. Specifically that private eye in the first panel. Are his motivations purely monetary, or is this a personal job? Who does he come home to at night? Is that his car he's tapping on in the first panel, or someone else's? And uh oh, there's the Professor too.