I have build myself a "blowjob-machine", which, in my poor opinion (*GG*) does a really good job!
I've chosen to dub it "SucksAll" - a parafrase over the well known "FucksAll" - which for some reason or another also relies on a bayonet saw...
In this mounting, I've applied it to my 'Camera chair', and have added in a butt plug, at the same time.
The logic is rather simple, in fact: When the vacuum cleaner is powered up, it sucks the cock into the sucking-tube, which the bayonet saw is moving back and forth. The speed of the bayonet saw can be adjusted from (about) one cycle per minute, to "far too fast".
I have, as usually, made a video, where you can see the SucksAll in
operation: 