When two or more people get together and sit on a somewhat loose and thin bench made of wood. A sander is then placed in between the two people and turned on, sending vibrations though the bench. This send a tickling feeling to the people ass and or balls, causing a nice erotic feeling. This is considered"gay" by many people.
while having anal sex, roll a piece of sandpaper(with the sanding side in) and insert this in the girl/boy's anus which you continue to fuck until you cum or are bloody and raw
Tim continued to give Matt a sander blaster through the pain, what a pal.