I did an experiment:::
I live in Brazil, coffee here is like water, everywhere you can get some free coffee, its a cultural tradition to drink it. Im a student and teachers recommends it to concentrate, so for the last years i became addicted to coffee. Every morning i had to drink it, without coffee my day was fucking boring. January this year i had the felling to stop using this shit, im too anxious and i need to control it, caffeine is stimulant, is like gas to my anxiety disorder. So i stopped. The first two weeks was terrible, many headaches, insomnia and a dead penis. Yeah my dick never became 100% in those first weeks without coffee. So i stopped for 3 months, January till April. What i noticed after two weeks without coffee was a bigger flaccid and that my erections and girth was much bigger. I dont know how much was the difference but was very noticeable… My studies came back in May and i started to drink coffee again. In the period with coffee my dick got a little smaller and my girth decreased.
Now i stopped to use coffee again. Im 10 days without it and my erections and girth are better now, my flacid is bigger and im getting more random erections during the day. Im felling hornier… I want to cut everything that have caffeine like coffee, colas, chocolate (another addiction), tea… Caffeine is not good for overall health, if you want to improve concentration, just do yoga and meditation…