I thought caffeine was bad for erections, because it is a vasoconstrictor. But here’s a study that says that caffeine is good for erections, at least in diabetic rats.
It turns out that caffeine is an inhibitor of phosphoesterases – the same enzymes that Viagra works on.
So, to keep your diabetic rats frisky, give them coffee. Whether this applies to humans, with or without diabetes, has not been determined.
If you want to read the article yourself, here is a link to the full text: CLICK HERE.
Please note — although the attached picture shows a rat smoking and drinking coffee, we do not endorse the smoking of tobacco by rats.