I thought I had tried most ways possible to get myself off until this week.
I was thinking about docking (two guys tip to tip with one pulling his foreskin over both heads. I figured that it might be fun to experiment by using my finger inside my foreskin.
Right off, the feel of pushing my finger inside my foreskin as deep as it would go felt really good. Next, circling it round from the back, next to the frenulum, around to the other side, as far as it would go, sent shivers down my spine. Circling my deep finger around my glans felt amazing.
The combination of the intense stimulation of the glans and the sensation of my finger being in a warm moist place (it felt like my finger was inside inside a woman) gave me overload.
I continued stimulating by using a 'come here' gesture, a bit like prostate stimulation, whilst sliding the skin from the base of my shaft upwards to take my foreskin as high up my finger as I could. I managed almost three inches which amazed me. Then I would slide my hand back down my shaft just far enough to keep my finger still inside my foreskin, in nice slow movements.
Animal instinct took over and I worked finger and hand together purposefully, building up speed, until I couldn't take it any more. As I shot my load, I clamped my foreskin tight, high around my finger inside it, catching all my ejaculate.
Second time I tried this technique, I started from flaccid. The feel of my cock getting hard and the way the sensations from my glans changed as my erection cranked up added an extra dimension.
I haven't docked with a guy but can appreciate the attraction, particularly for guys who are cut and have never had the chance to feel a foreskin sliding over their cock head.