http://shine.yahoo.com/shine-food/16-aphrodisiac-foods-put-mood-175500551.html

I looked at the list and it did not contain my "go to" aphrodisiac, watermelon.  It contains precursors to nitric oxide, a potent vasodilator.  I don't know if it really makes a difference.  But I love watermelon.
---later

Actually 2 grams of acetyl-l-carnitine plus 2 grams of GPLC-l-carnitine work better than Viagra or Cialis. Both are more potent vasodilators in the penis' endothelial tissue. I'm not sure you could ever consume enough watermelon to get the desired effect.

I guess it works for the wood but definitely not if you're hoping for a swallower. All the studies I've seen say it adds a funk factor that is difficult to overcome.

As always, be safe and have fun