I first heard about self sucking about five years ago. There was a tutorial on an adult website that caught my attention. It showed a few necessary stretching exercises for the neck and lower back. I did the stretching exercises and decided to try the position the man in the tutorial was in (laying on my back with my legs pulled over my head). I decided to repeat the stretching exercises as well as edging a few times to ensure a full erection and flexibility. I pulled my legs over my head and with little effort I was able to go about an inch past the head of my penis. I was so amazed because I didn't think it would happen. Although I didn't achieve orgasm the first time, I was able to after I tried it again and felt more comfortable with it.