Yeah, about panel 1: the idea is that in order to be a purebred female, both of the cat’s genetic parents would have to be female. I’m not sure the joke landed well.
The second, third, and forth panels are, sadly, based on a true story. A large, hirsute, and perpetually sweaty coworker announced that he had adopted a puppy. He asked a big group of his work acquaintances, myself included, if we wanted to see a picture. We said yes, because, puppy. He pulled out his phone and showed us a picture that is basically the second panel, only with a tiny puppy instead of a full grown cat.
It was a deeply uncomfortable situation for everyone but him. He seemed perfectly comfortable.