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Sounds like a front massager. Different tools that certainly have their place, especially when there's no pipe handy.

yeah there's all sorts of useful shapes and convenient features, priced for every budget. Better in most ways!

pipes just lead to trouble

As I understand it you can even source them with specific bend and taper profiles, which lets you optimize for the geometry of the system you're trying to flush.

I've seen one recently that seemed to be long and skinny enough where if OP could see the part, he could vibrate the part. I have no idea what part of the human anatomy such a device is necessary for. Maybe top-of-the-foot while standing?

Near field Teledildonics

>pipes just lead to trouble

I'm an old pipeliner. I can vouch for that.

You can buy vibration motors on AliExpress for $1.

yeah, downhill mountain bike mechanics have used this method for brake bleeds for a while.