In this episode of That '90s Comic:

Seth isn't allowed pets. Dad is strict when he feels like it. Dog knows about Seth's ugly girlfriend history and supposedly he "knows everything". 

Bonus Info:

Ah, making fun of girls in comics is a great tradition of the '90s. Hopefully the CCP don't try and take this glorious tradition away from us in the future. (Foreshadowing? Surely not.)

This comic gets a 51/69.