Why? Because they're nice to share with friends, especially when paired with hot chocolate.
Why else? Because my momma sent me an oatmeal cookie mix to enjoy.
Why else? Because since I can eat sugary oatmeal in mushy form, I think it's perfectly acceptable that I ate 8 oatmeal cookies and a slice of pepper jack cheese for dinner tonight. At least this way there's egg and dairy involved.
Judge all you want, but I bet my dinner made me happier than yours did.