What if I have a telescope by my window to watch the neighbors in their home?
That is disturbing. Do you see anything interesting?
I saw them having sex.
What your neighbors do in their own home is their business. You peeping on them with your telescope is incorrect. Respect your neighbor's privacy and don't spy on them.
People need to learn to be more private.
Your neighbors are being private when they take actions in their own home. You should not go out of your way to peep in and spy on what your neighbors are doing. You should consider how you would feel if someone were spying on you in your home.