I wasn’t aware that there was more then one type of affair.  But four!  1. A sexual affair ( the one that everyone knows about) 2. Fantasizing   infidelity (which may seem harmless but can be lethal 3. Visual infidelity (like pornography) 4. Emotional infidelity (like a bad mother in law who doesn’t understand about the dynamics of relationships).  This was very eye opening for me because I feel like many people are having an affair they just aren’t aware.