When I was younger and before I could afford the
sex toys and sex dolls I use today, I very often would
use a sponge mattress or sponge cushion to masturbate
with. At home back them I would just take the cover
off of one of the couch cushions in our basement, and
I used a knife to slut a hole into the side of the
cushion and deep enough for me to fuck, and I then
would take a banana and wrap it with saran wrap and
insert the banana into the hole, and then pull the
banana back out leaving the plastic of the saran wrap
still in the sponge cushion as a lining, then I would
put lube all over my cock and fuck away. I figured the
saran wrap technique through trail and error, because
without the plastic lining the wall of the sponge
hole, the lubricant on my cock would quickly be
absorbed by the sponge making it more difficult to
fuck. Another technique would be to make the slit into
the sponge cushion and then slide the banana into the
hole, then while the banana was all the way in, I
would cut off the end on the banana still sticking out
and squeeze the sponge forcing the fruit out but
leaving just the banana peel still inside, that also
made for a great channel for my cock to slide in and
out of, and also felt really wonderful. The sponge
material always made a nice tight hole, and the banana
peel felt so nice wrapped around my cock, it was
perfectly slippery, and I didnt require any lube as
the inside of a banana peel is perfect for fucking.