Keeping it in the family?!

Now... I try reeeally hard not to judge people, honestly. BUT I Just found out two of my teenage cousins are dating. What. The. HELL. And their parents ARE OKAY WITH IT. Ethan's grandpa, Cora's great-grandpa, and my grandpa are all brothers. My grandpa is 1 of 26 kids. Yes, twenty-six. So there's some age between them. I guess there was bound to be some foolery with as many cousins and stuff we have at our reunions. I feel like you shouldn't date the great-grand daughter and grandson of your great uncles... You just should notttttt date your cousin you are blood related to. 1st. 2nd. 3rd. 4th. Idc. It just doesn't seem right.