2 Peter 2:14. The definition of adultery includes it being a sin in God’s eyes. Adultery is an unrighteous act. In no circumstances can it please God when you commit adultery. Adultery starts where you lust for someone that you are not married to. You are not pleasing to God when you are “girl watching” because this becomes a slippery slope that will lead to adultery. You are basically coveting someone else’s wife or daughter when you “girl watch”.