No the caffeine is an astringent, and the local application allows maximum benefit with minimal systemic side effects. It'll allow the warm moisture and slight friction to remove the gunk while minimally stimulating additional production.

Caffeine is drugs, y'all. It's actually one of the most potent OTC medications available and it's just in random recreational beverages like fucking cola drinks. Similarly to alcohol the main thing preventing stricter regulatory control is just how easy it is to grow / obtain (there's at least three plants that produce it naturally). Panera's charge lemonades were literally killing people a few years back lol people really be thinking legal vs illegal under our corrupt-ass mf government is any good measure of potency / abuse potential, when most of the social detriment of substance use stems directly from legal status. Honestly I have a theory that stimulant usage being overall less stigmatized than depressant usage is a product of capitalism's constant glorification of "productivity."

But then what am I supposed to drink after a job well done?