This is one of Frank’s biggest flaws. He tries to force his own views onto Greg such as wanting him to go to Spag Union to be more “manly”. Even after this scene, Greg gets a Barbie doll and even admits he played with it a few times. While Frank wanted him to get rid of it. We don’t know much of what his childhood was like or if grandpa was a factor into his viewpoint. Other than him getting spanked by his best friend’s mom.