I was just having a conversation with a friend of mine and found out that he has been doing penis enlargement for 4 years and he that he also gained a total of 4 1/2 inches in those 4 years. When he told me that i could help to ask what he did to get gains like that and he told me that he flexed. What the hell is flex? Before our conversation got interrupted he trying to explain what it was. The only thing i got from it was that he put a wet towel on his dick and flex and then end of conversation. So has anybody heard of the flex thing?