Simplify the following text for a Grade 11 native English-speaking person.
Original: Witnessing a partner masturbate is a educational activity to find out the method a partner pleases them selfs , allowing each partner to learn exactly how the other enjoys being touched '' .
Simplified: By watching a partner masturbate , one finds out the methods they use to please him - or herself , allowing each partner to learn exactly how the other enjoys being touched .