It's generally taboo, but many gardeners in the know secretly pee on their plants. For ethical purposes however, upstanding gardeners do not sprinkle on the leaves of edible herbs. Generally.
Now, I am not saying I feed my plants urine, or urinate on them. I have a career and a possible illlustrious future to safeguard.
I will, however, say that an unnamed person's pee has graced this yet-unidentified fat, healthy, and hydra-headed plant:
Compare its leaf growth and height to these three ones, which were planted even before it. I grew all of them from seed. The un-pissed on ones haven't even hydra-fied out at all! They are timid, though they get the same soil and sun:
Of course, the latter are three plants sharing one container, but I have investigated and found the single plant's roots have not creeped to the left-hand side of its receptacle. I have no side-view photos, but the lone one has grown way (like waaaay) taller! And it's even about to flower bright pink lovelies:
Feeding your plants urine requires polite discretion and one other consideration: dilute in water, as too much nitrogen is too much of a good thing, I'm afraid.