If you are a minor under the age of 18 years or 21 years where 18 isn't the legal age of majority , if sexually explicit material offends you or if it's illegal to view such material in your community, you MUST leave this by clicking EXIT below. Only consenting adults are authorized beyond this page. You have read this agreement, understood it and agree to be bound by it. In the study published in the Journal of Sex Research, researchers also found that the difference in length between a short penis and a longer one was a lot less obvious when erect than when flaccid. The penis is a kind of sponge that fills with blood when a man is sexually excited. This Site Contains Sexually Oriented Material The following website, including all webpages, links, images and videos, display sexually explicit material. The breakage usually occurs when a man's penis slips out of his partner and is violently bent. The penis is not a muscle Contrary to popular belief, the so-called love muscle does not contain any muscles. You can break your penis If the penis is violently twisted when erect, it can break. If you are a minor under the age of 18 years old or 21 years old where 18 isn't the legal age of majority , if sexually explicit material offends you or if it's illegal to view such material in your community, you MUST leave by clicking EXIT below. You are an adult in your community and are at least 18 years old 21 in some communities ; You will not expose minors to the sexually explicit content you are about to view; You believe that sexually explicit material is not offensive or obscene; Sexually explicit material is not deemed to be obscene or illegal in your community and you wish to view such material; This Site Contains Sexually Oriented Material You will use the material available on this website for your own personal use and will not sell, distribute, give or make available the content on this website to anyone. Blood builds up inside 2 cylinder-shaped chambers, causing the penis to swell and stiffen. Researchers at University College London measured the penises of men, including teenagers and pensioners. Enjoy the natural beauty of these amazingly ripped gay black men while they partake in hardcore all-male action.