Some experts suggest that caffeine/coffee triggers a pharmacologic cascade that results in relaxation of cavernous smooth muscle, thus helping with ED. Furthermore, coffee is rich in erection-friendly polyphenols, and can possibly pump up testosterone concentrations, enhancing blood flow to the penis.
Herein, does caffeine affect male erections?
Erectile Function
Men who drink two to three cups of coffee per day may have an easier time getting and maintaining an erection. This may be due to caffeine relaxing the arteries and smooth muscle in the penis, allowing more blood flow and improving erectile function.