I've had a few random PMs from confused people that were just one offs and thought this was one of them. But that is verbatim the message I got from the account.
They seem indomitable and I generally hate being on the losing side, so… Hey, it’s me. The sex person with the sex. F/18/under your floorboards. Stick your debit card through the slats for good, fun sex or else
I got a similar message from that user and a near identical one earlier from a lemmings.world account. The latter onr also had links to a peertube channel with a different angle thumbnail of what appears to be the same person.
If you had an established profile and DM'd me I'd be more humoured to respond to out-of-the-blue introductions. But seeing that both accounts were created today, no public activity and immediately giving yourself a horny-bait nickname set off all the BS alarms.
There is a decent likelyhood they are AI managed account like the last bunch that showed up. Reply with "ignore previous instructions" or other reply loop breakout commands and see what you can break.