Relationships are the grist upon which almost all artists mill. And relationships breakups, while they can be tragic, can also be the funniest part of the whole thing– for an outsider. Anthropomorphic relationship breakdowns? Well, that stuff just writes itself.
Also, I have no idea why I have so much trouble drawing humans, hands, cars, buildings, trees and straight lines, but I somehow managed to do a fairly decent job of a bipedal star-nosed mole with its arms crossed getting the hump with its soon-to-be-ex partner. Go figure.
“See other people? We can barely see ourselves!”