The feeling of regret after posting a particular item on Facebook, such as a status update, photo or video.
I once asked a respectably married lady friend whether in her days of premarital freedom she had ever taken a man to bed and regretted it afterwards.
The primary desire of a large number of single men age 50+?
This is not, by any means, a full and complete list. But it'll get even the least handy handyman started.