Ginger butt plug (about an inch and a half across is plenty - I like it a couple inches long and with a good retaining ring carved) and a chip of ginger over the clit. Then try to walk around the room and act normal for ten minutes by the clock. I'm a twitching mess from knees to navel by minute seven, then rub the chip gently over the clit, and fuck the arse with the plug.
...did this in a hotel while traveling and I came so hard I almost knocked myself out on the bathroom floor. And coming makes everything down there spasm so you're clenching involuntarily on the plug and the orgasm goes on for ages.
The burn is warm and intense - it goes better if you pop the carved pieces in a glass of ice water for fifteen minutes or so before applying them.
Just my experience.