A towel between the mattress and box springs

I was living alone for a few years and I wasn't having much luck with the girls. I would "read" Penthouse Magazines as my stimulus of choice and placed it on my bed as I knelt down to read and masturbate.  I started tucking a towel in between the mattress and box springs and let it cover the floor to catch my cum. One day I got curious and stuck my hard-on between the layers of towel and fucked it. It felt good, not pussy good but good enough to keep me hard until I shot my load. I used this technique for awhile.  I'd change it up by wearing a condom and sometimes adding a warm wash towel. That was just enough to keep it interesting. I admit that I had some rather intense and heavy orgasms doing it that way.