Effect of Chocolate 4 Times More Powerful than a Passionate Kiss?

Really?  Chemistry, Love and Chocolate!

"The effect of Chocolate is four times more powerful than a passionate kiss" suggests chocolatier Oliver Kita in a byline for his Saint Valentin Collection.

In Chocolate: Aphrodisiac or Euphamism? Michele Doughty of Bryn Mawr College mentions Phenylethylamin and Seratonin, 2 substances found in Chocolate as the possible source.