Leaf spot first appears in rainy or humid weather as the plants are growing. They look like small brown spots with a water-soaked margin surrounded by a yellow halo usually on the upper halves of the iris leaves.
Two, caffeine enhances the sensation and contractility of the bladder. Another way caffeine can affect prostate health is through its ability to irritate the bladder because it is a theoxanthine, a family of drugs that includes theobromine (found in chocolate) and theophylline (found in tea). Theophylline also stimulates and irritates the bladder.
The caffeine in coffee is a stimulant that ups the heart rate and makes the blood flow. One study conducted with female rats and published in the journal Pharmacology, Biochemistry, and Behavior suggested that coffee could put women in the mood for sex.