Women are obsessed with that "Love Languages" shyt. It's like the Zodiac. Just learn the basics so you can play along when women bring it up.
The author had the right idea, it just wasn't executed well. It really should be called Love Preferences.
Basically, each person does have a certain way that they show love and affection, and they also have a certain subconscious preference as to how they like to receive love and affection. The author misses the mark because it's not as simple as he makes it out to be. For example, I enjoy giving gifts to the special people in my life. However, I don't really care to receive gifts. On my birthday or Christmas I don't want or need any physical gifts.
the issue imo is behavioral observations being used as another "requirement". the context is always framed in "this is how I need a man to serve me"

