Uses buttplug.io and Node for Max to control sex toys (currently only vibrators) from right inside Ableton Live. Is there a good reason to do that? Probably not, but someone else made a project to connect sex toys to Minecraft and I like to think that this is at least more legitimately useful than that. Since it just exposes knobs to control vibration level and just passes all audio data straight through, it's intended to be used with other M4L devices such as LFOs and envelopes that can control the vibration level.
You can download the project here. For some reason it seems to crash Ableton when used on M1 macOS unless you set Ableton to open with Rosetta, so if it doesn't work then try that.