When going to sleep, there is a chance of a scene happening where you have the option to 'Listen in' [Voyeur check], 'Tell them to shut up' [Assertiveness check] or 'Ignore them' [skip the scene]
Even with the Assertive option you can still watch them. Because they're not going to listen to you. However they will dislike you more. So... Take it or leave it. I chose that option and still watched to build up my dominance and Voyeur. If they're friendship meter gets in the red. Just go to the Arcade and get the some plushies until they're back in the green. That way you can build up your hand skills as well.