Children totally accept — and crave — family rules. “In our family we have a rule for X” is the only excuse a parent needs for setting a family policy. In fact, “I have a rule for X” is the only excuse you need for your own personal policies.
I think the most important thing in life is self-love, because if you don't have self-love, and respect for everything about your own body, your own soul, your own capsule, then how can you have a healthy relationship with anyone else?