An offer for amateur porn

I have a chance to appear on an adult website, watching a couple having sex while I masturbate. I really want to do this, but I don't have a very large penis. I think the chances of anyone seeing me are slim, but I'd be embarassed by my penis size if someone I know did see it. What should I do? I feel like it is a great opportunity, like having a live porn show right before my eyes. Would you guys do it? Would the size of your member influence your decision?