Simply touching SCP-999’s surface causes an immediate mild euphoria, which intensifies the longer one is exposed to SCP-999, and lasts long after separation from the creature. Subject’s favorite activity is "tickle-wrestling", often by completely enveloping a person from the neck down and tickling them until asked to stop (though it does not always immediately comply with this request). Though injuries may occur, SCP-999 has never been found to purposefully attempt to harm others.