I believe the term is auto fellatio. Several years ago I tried this for the very first time. I find that spending 2 or 3 minutes doing some basic stretching. For myself, after stretching and laying on the bed, I need to achieve an erection and at that point I now can pull my legs over my head. For me the entire head of my penis falls into my mouth. Throughout this process I keep both of my hands on my lower back because it's helpful for me to balance as well as you may need to apply a little pressure. I can close my eyes and using saliva, my lips suction, and my tounge can enjoy a wonderful experience.