Biggest you’ve ever taken?

Hii, I’ve recently started talking to this guy who claims he’s 10 inches. From the pictures he’s sent me I can tell it’s big. But I don’t know if I can do 10, like that is too much cock lol. I’ve never even attempted anything in the double digits. I’m wondering if I should let him use my holes, or tell him I’m too scared to try.

What should I do?