I just found out something very interesting.
Children of identical twins are genetically siblings, not cousins.
My mom and aunt are identical twins.
My cousin and and I are the same age and were raised together.
I have always thought of him as being like a sibling.
Now I find out we really are siblings.
And all this time I thought I was an only child lol.
"
Cousins whose parents are identical twins share 25 percent of their DNA, instead of the usual 12.5 percent. While full-siblings share 50 percent of their DNA, half-siblings share 25 percent. That’s why, though children of identical twins are legally cousins, they are genetically the equivalent of half-siblings."
https://bestlifeonline.com/weird-amazing-facts/I guess this means we can't get married.