Eating three times a day is fine. That will keep you healthy.
However, eating in excess just for the sake of it is gluttony. This is a bad thing and will lead to a person becoming unhealthy.
Basically, most things if you do them an excessive amount are not good for you. For example, eating fruit is generally good for you. But if you ate too much of it, you'd probably end up with kidney stones or something.
Breathing in excess is called hyperventilating and that's not good for you either. I should know as I used to have a lot of panic attacks.
Kissing your wife in excess? Nah. Not unless you don't have any lips left or accidentally suffocated her in the process!