C’mon dude, just open up and take care of me. I am so horny. I haven’t had a decent blow job in weeks. Your girlfriend keeps trying, but she just isn’t very good. She says it’s too big and makes her gag.  She only gets the first four or five inches in her mouth before she has to pull off the breathe. I have stopped even trying to get her to suck me off, now I just shove my cock deep in her cunt. 

She suggested that if I really wanted a good blow job, I try out her boyfriend, which is you. She said that you were so bad at satisfying her, you must be have skills elsewhere. Plus I think she wants me to teach you how to use a cock properly. So open up and lets see if she was right.