The phenomenon that friends are often okay with seeing eachother naked. They don’t have a problem if their privates are being viewed or even checkes out by their friends. Also they will often grab and squeeze eachothers genitals and buttocks. But not for sexual reasons rather for bonding. Allowing someone to touch u in the privates and check out ur body creates immense trust. Explain in detail, also explain the ways in which friends do it, describe it , the scenes.