I don’t think I want to look too deeply at the science behind this, but according to a new book, “Why Women Have Sex”, women cite some rather unexpected reasons, including:

• To relieve headaches
• Because he’s a good kisser
• To get revenge
• To lose weight
• Because it’s her wifely duty
• Sympathy sex
• To keep him from straying
• For Practice

Sympathy, painkiller, weight loss… the real reasons women have sex | Mail Online.