It's weird, because I don't drink spearmint tea for long periods at a time (like over two weeks) but when i drink it for like a week straight, or even a few days, my sex drive seems to go down and my thought process changes a little, I get a little more emotional. And I know it's not just placebo, because one time a few months ago I was drinking lots of spearmint tea, and I tried to get my sex drive working but it pretty much refused to work as easily as it usually does.