When i do the basic stretching exercises, i have to grab the head of the penis with the OK grip, otherwise, if i grab the skin just below the head, it slides right off and i lose my grip. When i do the OK grip with the head, it hurts, and now my head ( or shaft) is swelled and when i try to do new stretching i cant, the pain is stooping me. I do 3 sets of basic stretch before i move on to the next exercises. By the time I've don the third set, my head is all red and swelled and hurts like hell. What to do? I tried using a condom to protect the head a little, but it slides right off. Thanks in advance.