In A Midsummer Night's Dream Why does oberon want titiana to fall in love with something?

Oberon wants Titania to fall in love with something so that he can distract and manipulate her. He does this as a form of revenge for refusing to give him a changeling boy she has in her care. Oberon uses a love potion to make Titania fall in love with Bottom, a Weaver transformed into a donkey.