New word

A hedonist is a person that prioritises experiencing enjoyment, often sensual, over other activities, usually without thinking too hard about it.

An arseonist is a hedonist who explicitly models the downside and proceeds regardless. Ironically, an arseonist uses their head when a hedonist doesn’t.

Arseonists are not to be confused with people that start fires for fun, although in rare circumstances an arsonist is also an arseonist.