Finally, there are sneakers. The soles of which are made of rubber. I am talking about Keds-like sneakers with crepe rubber soles. Given that as a child masturbator I was looking for things made of rubber and used by girls, Keds sneakers were a natural. I developed my fetishes in the 1950's and 60's. Every girl wore Keds when she wasn't in school or in church.
The first way I learned to masturbate with sneakers is to hold them in my hands sole-to-sole so the heels were facing away from me. The part of the sneaker that is between the feet is up. Holding the sneakers this way, they make sort of a book. I open the book, and let my penis fall into the slot. I put my penis on the part of the soles that correspond to the ball of the foot. Then I simply hump. I can vary the way the rubber meets the penis by tilting the heels up and pressing the rubber into the penis, and by opening or closing the sneaker 'book.'
Obviously the way the soles are constructed is important. Most of my masturbation was done with Keds-like sneakers that had crepe rubber soles. There are a lot of Keds-like sneakers out there. Experiment carefully with new types of soles. Generally speaking for this type of masturbation, the simpler, the better.
Also, I will be describing different sneaker masturbation techniques. Soles that are good for one kind of masturbation may not be so good for other types and vice versa.
Note: the original Keds had a crepe-type rubber sole that was somewhat abrasive when new. The sneakers had to be worn for a while. Luckily my sister (whose sneakers I 'borrowed') was an active girl and this happened quickly. The new style Keds have a low-relief crepe rubber soles and can be used out of the box.