Well, this is embarrassing

I've got a pop quiz for y'all:

The term "Fart Oil & Back Heat" refers to what, exactly:

1. The two most popular sellers at Spencer Gifts in the mall?
2. An offbeat TV comedy starring Jack Black and Owen Wilson as his talking-motorcycle sidekick?
3. What my son informed his mother I leave on my side of the bed when I get up in the morning?

I don't think I need to tell you the answer.  I'd be terribly embarrassed sharing this with you if it wasn't so hilarious.

Extra credit if you guessed that Fart Oil and Back Heat are actually synonyms.  Because, of course they are.