One (old) piece of advice I heard.
Your pocket handkerchief. Rub it on your balls. Then put it back in your breast pocket.
You will get more attention from the girls.
Pheromones are real and powerful.
Shikantaza meditation So smooth
Lime jello with sliced black olives
Both are based upon rationality, which is always broken.
I prefer aesthetics/feeling-of-rightness.