A quick search of the women’s section on “turn up the heat” just returned 25 pages of posts for me.
Here is a recent thread where it is mentioned several times, staring with Tisha’s entry: Help the boy is passive!
Here is a recent thread about application directly to an SO’s pillow: Turn Up the Heat on his pillow: a "quick & dirty" review
Here is a link to the results I got for a “turn up the heat” search: http://www.pheromonetalk.com/search.php?searchid=306103