Had a weird experience last night and this morning. I had a two hour session last night stimulating my penis topside corona. The position I use is two fingertips just under the edge of the glans. When my dick's hard, there's a little depression valley that runs around the penis there, just below the glans. With fingertips in that valley, I just jiggle them lightly back & forth )toward then away from penis tip(. If I do...