His penis appears small because it’s flaccid. He could not achieve an erection probably because he masturbates to porn a lot and his penis only knows the sensation of his own hand instead of his girl’s mouth. My guess is he is likely to average size with an erection. He should try refraining from masturbating for 5-7 days and then try again.
Most men with small penises like myself ejaculate their disgusting mess rather quicky with women since their little dicks get very little attention from women since they are annoyed by the small size.