The thing that keeps me coming back is this: the raw lust and animalistic hunger for another man, his cock, his hole, his "maleness" put within the tender, loving context of "I love you - I feel you - I cherish you as a man while we are physically together". To be intimate as a man with another one feels intimidating at first; do you really care for me or are you just going to chastise me? Do you really know how I feel? Do you care? Until you realize that the other man feels love and lust in exactly the same way you do. At that point, my mind is blown (pun intended) and I surrender to the experience of pure love, pleasure and lust. I lose myself in the moment. My mind shifts to intense feelings of love for the dude. Like - I feel as one with him as we kiss deeply and I can feel his beard on my face.