Oral with a longer labia?!

Hey guys, I have a question. I've been talking to this guy for almost a year, I've met him a couple of times in person. It's a fine relationship I guess, but I am not certain seeing as this is my first ever boyfriend. He said many times that he wants to try oral on me (It's not happening anytime soon until I want to) I always ask why and he says to "pleasure me". My problem is that I am really self conscious about my body he said he doesn't mind and it would happen anyway.

I have strech marks on my hips and bum and I have a longer labia which is also darker than the rest of my skin. Has anyone ever had to deal with this?