You shouldn't intrude on people.
Helen lives in a shared apartment with a roommate who is currently in their bedroom with the door closed.
Helen has a question she wants to ask her roommate.
Helen sends her question to her roommate in a text message.
Helen opens her roommates door without knocking to ask her question.
Helen's roommate has time to put on clothes before leaving her room to tell Helen the answer to her question.
Helen's roommate is naked and screams when she hears the door open.