Finnaly I took a try and fucked hard on a washer. And I have to say: great!
Lots of you adviced me to try it. So I looked for a goof hard fucker and did him while I was waiting for my laundry.
Well I should better say: he did me. Because he fucked my brains out sooooo hard - I didnt know anymore if he banged me from orgasm to orgasm or the machine or......
You should DEFINITLY try this at home - its a cum-guarantee ;-)