In his own words, here's how Chapman breaks down the five love languages in his book:

The five languages are pretty straightforward, but here's a brief description of what each of them mean:

• Words of affirmation : Expressing affection through spoken affection, praise or appreciation.
• Acts of service : Actions, rather than words, are used to show and receive love.
• Receiving gifts : Gifting is symbolic of love and affection.
• Quality time : Expressing affection with undivided, undistracted attention.
• Physical touch : It can range from having sex to holding hands. With this love language, the speaker feels affection through physical touch.