My cock is also relatively small at 14.5cm erect length and I'm fine with it. I know its under average size and get off on it when my wife says its a bit small. She prefers big cocks and tells me what its like to fuck them while I masturbate. When we have sex I can just go for it and dont have to be careful like guys with huge dicks and if its not enough, I just use three or four fingers with my cock at the same time.