Because you had to know…

thousands of dangerous erection cases seen in ERs each year!

http://www.everydayhealth.com/mens-health/1202/thousands-of-dangerous-erection-cases-seen-in-ers-each-year-study-finds.aspx

Just goes to show, whenever you see any of those erectile drug commercials (here in the US, of course, where ads for pharmaceuticals are waaaay too common) and the announcer states something along the lines of “Call a doctor if your erection lasts more than five hours”, you best do this.

Otherwise, you could face this very, very scary scenario…

http://www.ajc.com/news/news/man-abuses-erection-drug-has-penis-amputed/nZ4pZ/