"There's no problem so awful that you can't add some guilt to it and make it even worse." Or so said Bill Watterson, the creator of the beloved comic strip Calvin and Hobbes.

While we're pretty sure Watterson wasn't referring to the problem of erectile dysfunction (ED), the comment is applicable to the condition that affects at least 30 million men in the United States.

The science around ED has come a long way in recent decades, both in understanding it and treating it. Of course, the changes brought about by the development of sildenafil (Viagra), tadalafil (Cialis) and other erectile drugs are life-altering for millions of men.

Not only that, but modern medical practitioners also understand the complex interplay of