A very good friend of mine went to the UK for his master's two years ago. After his breakup and several hookups (via online dating sites), he told me that he is very depressed, especially after one of the people he met explained to him that even though everything was okay, his penis didn't "flare" up during intercourse after he asked that person out of frustration.
According to him and his physician, he doesn't suffer from erectile dysfunction. Now, I don't know about the specifications of his penis (length and girth) and it is not of much concern to me, but he is considering all sorts of remedies, for example; jelqing, kegals, hydro pumps/penis pumps, pills, etc. If none of them works after a long term usage, he said he would go for surgery.
But based on whatever I could find on the internet from several online forums, all of these techniques only yield short term/temporary results and they'd rather stick to their normal self or improvise than using any of these dubious procedures. Here is a quote from this Wikipedia article:
Products such as penis pumps, pills, and other dubious means of penis enlargement are some of the most marketed products in email spam. At present there is no consensus in the scientific community of any non-surgical technique that permanently increases either the thickness or length of the erect penis that already falls into the normal range (4.5" to 7").
But the same article (which was cited in the particular section of the Wikipedia article) links to this and this article which has rather made me uncertain as to what to believe. Especially, the long term usage of any of such products. I am not sure about the surgery part, especially it being safe both in the short and long run, not to mention the cost of such surgeries. I'd be glad to know more about the same from some legitimate and unbiased studies/sources if any, so as to convince him to not waste his resources on such products and rather exercise regularly, consult a sexologist and psychologist (if needed).