Never, never, never disclose the "Viet Nam Vet" story to your wife, no matter how much she begs to hear it; and after your old clueless friend opens his fat mouth and says things like, "I must have told that story a thousand times, it's so freaking hilarious. I still can't believe you did that, man!" Even after you tell her she wouldn't like it as it involves details of carnal relations with another woman, and she swears, "Why would I get upset over something that happened over 25 years ago? Give me more credit than that."
Married Life Lesson #6749
Remind your stupid, still single friends at least every couple of years that there is no statute of limitations on old sexual exploit conversations when it comes to your wife. What happens in Vegas (or wherever) etc, etc.
Idiot!!