Careful! Rough sex is now the standard in the adult industry. A lengthy career in porn will cost you a prolapsed rectum, torn vagina and a shitload of STD's. I'd stick to becoming a doctor if I was you.
His girlfriend doesn't sound too happy about his poor performance between her legs. They have anesthetic creams that work wonders for premature ejaculation. I'd say buy some.
Fuck, I remember downloading this video off of Napster back in 1999. It taught me the pussy eating skills that I have today and is directly responsible for dozens of sexually satisfied BBW's worldwide.
If your penis is insufficient, watch this video and learn how to give a girl an orgasm so big that she'll giiggle like school girl and love you forever. This would be quite a change for me, most girls just spit in my face after sex. They just can't seem to appreciate ass 2 mouth.