I read a suggestion in an issue of a sex digest (not Variations, but I can't remember which) that you slice a jalapeno pepper on the bias (diagonally) and rub the open ends around the "sensitive areas" of your sub. According to the writer, the areas would first tingle, then (after ten or fifteen minutes) begin to itch. By the time the itch set in the pepper juice could no longer be washed off, because it had soaked in beneath the upper layers of skin, so the sub was in for two to three hours of itching.

Capsaicin is the active ingredient in pepper juice, and the amount of it present in the juice is measured by the "hotness index" of the pepper. The author reccomended sticking with the (relatively) mild jalapeno, saying that some of the "super peppers" could cause a burn, rather than just an itch.

I suggested this to another poster in the Forum who was looking for a new thrill. Unfortunately, she had already tried it and she responded that even the "mild" jalapeno had been too much for her and she wasn't going to try it again.

I hope this is some help.