We all cry sometimes. For example, you may get sawdust in your eyes while woodworking. Or you watch an emotionally intense movie, such as The Dirty Dozen.
Those are the two occasions when it is acceptable to cry.
But Aaron Gillies, a comedy writer, has noted that his wife cries more often than that. She cries at incidents that he finds trivial. He has published a list of some of these occasions. These include watching a rabbit escape from a fox in a nature documentary and remembering that swans can be gay.
On reflection, I agree with the wife: all of these are legitimate reasons to cry, which you can now add to the pair that I have mentioned above.
Now, as a happily married man who plans to remain that way, I advise you gentlemen to never do this. Embarrassing your wife online is a terrible idea for most marriages. But Gillies's wife tweets that "I don't feel at all attacked." She's a good sport.