Hollow out the inside of a cucumber fitting the size of your penis and just thrust in and out of it.
Author:SoloTouchArchive | Category: Masturbation Male Techniques

My ex husband used to live using a banana peel, I loved watching him, haha. I used to peel them from the bottom up (they seemed to hold together better). I still remember the first time, I had just ate one, I held the peel in my hand and said "you know I've heard these make great masturbators". He replied "give it her and I will try it". I could tell by the look on his face and the sounds coming from his mouth that he was enjoying it and I was enjoying the show.

yep, you can also make small hole at the top, you'll be able to adjust succion by closing or opening the hole with a finger