10.) With your wife, visiting her sister.

9.) Golfing with the guys.

8.) With your wife, and accidentally run into your ex-girlfriend.

7.) Showering with the guys after a basketball game.

6.) Visiting a friend in the slammer.

5.) While being pulled over for a traffic citation.

4.) Shaking hands with your pastor/priest after church.

3.) In front of your child’s 3rd grade class, looking at the teacher, for show and tell.

2.) Standing on the subway with a bunch of nuns watching you.

And the number one time never to get a woody is:

1.) When your best friend on a guys night out, asks you, "Hey what do you want to do tonight?"