In high school because I played all sports I could play. And also took Gymnastics as a class/grade. I was stretching 3 to 5 times a daily. I would stretch for P.E., then for gymnastics but I also had weightlifting during study hall for which ever sport I was playing. Which required stretching. Then practice or games which required stretching. Needless to say, I got extremely limber. As I was also Crossdresser/Trans/bi-sexual curious. I often fantasized about sucking cock. Especially while dressed. So, one day I tried to suck my own cock, because I knew when stretching, my face would be extremely close to my groin area. I was able to get the head in my mouth but wasn't able to bob up and down. So I laid on my back one day and threw my legs back as if I was going to roll over backwards. Wow! I was then able to get my entire cock in my mouth and stroke it with my lips. I eventually started swallowing my loads and did so well up into young adult life. just not the same as licking out of my palm which I do on occasion.