Chubby girls taking head

Ok so I'm a chubby girl (thighs rubbing, chub chub stomach, etc) and I wanna try head with one of my friends. We've agreed to having sex, but I want to see what It's like to have someone give me head.

I'm just a bit worried that he might not want to because my thighs are big and they'll just be in his face. He doesnt care that im big but I don't want to ask for head in case he feels uncomfortable with it.

I'm confident in my body and all, I just want to know whether or not I should ask him for head. I want to know what its like, but I don't want him to feel uncomfortable

Help please