My venture into fucking machines

I've been fascinated by fucking machines for quite some time, but until recently didn't really have a partner with a kinky interest in them, so there was no point in acquiring one. Luckily that has changed a few months ago, and it may actually be a good thing that I'm starting late - as this allowed me to skip earlier designs go straight away to what I consider vastly superior technology.

Older fucking machines basically had nothing but an AC or DC motor driving a piston. All you could adjust at runtime is the speed / RPM of the motor. If you're lucky, there's the possibility to adjust the stroke depth mechanically (while the machine is standing still). But that's about it.

Contrary to that, there are fucking machines today which feature a tightly controlled high-torque linear motor. This means every stroke can be fully controlled and parametrized: Where does it start? How deep does it go? With which speed does it move in? With what speed does it move back out? This allows for much more interesting control. You can make the machine fuck the subject deeper from one second to another. Maybe only for one or very few strokes? You can emulate much more realistic hard fucking moves by very quick inward and much slower outward movement.

After some research, I decided to obtain a Fredorch F21S, which is probably one of the lowest-cost fucking machines with a linear drive.

There are some safety aspects that definitely need careful consideration and potential improvements.