Combat erectile dysfunction

Just watched an advert for Cialis which is a drug to combat erectile dysfunction.

In the "small print" they say,

If your erection lasts for 4 hours seek immediate medical attention.

Anything under the 4 hour mark is fine. Just enjoy yourself and treat yo' woman right. But if you maintain your belisha beacon for a full 4 hours then don't mess about. Stop enjoying yourself and seek immediate medical attention.

Cialis. For the way we combat erectile dysfunction.

I'll say.