Every man is going to have the occasional missed erection. Maybe you’re tired, or your mind is preoccupied, or you’re just not in the mood. It happens. But when you begin to see consistent missed erections, it can be easy to panic. You’ll run through the mental list of causes, combing through your memory to determine what recent events lead to this issue.

But it’s important to determine if you truly have erectile dysfunction or you’re just having an off day.

Thankfully, you don’t need to pay a costly doctor’s bill to determine if you have erectile dysfunction. There is a simple test that can be performed in the safety of your own home that can help to determine your erectile health.

Here’s how it’s done:

  1. Pick up some stamps: Stop by your local post office and grab a roll of stamps, the kind with dry glue on the back.
  2. Get ready: Before you go to bed, pull your flaccid penis through the fly in your underwear. Make sure your pubic hair is out of the way, and check to make sure the shaft of your penis is exposed and easily accessible.
  3. Apply the stamps: Moisten the stamps on the roll, and then wrap them around your penis. Make sure the stamps overlap, with no break in the chain. Once the stamps are secured, put your penis back in your sheets and go to bed.
  4. Check the results: When you awake, check to see if the ring of stamps have been broken. If the stamps are broken, that indicates that you had an erection in your sleep, and are capable of achieving an erection. If the stamps are unbroken, that indicates that you are unable to achieve an erection.

Once you’ve performed this test, you can then determine how best to address the issue. If you did not achieve an erection, that could indicate something is wrong physically with your erection, and a doctor should be consulted.