How does Oberon's plan for Titania go wrong?Act 3, Scene 1 of A Midsummer Night's Dream by William Shakespeare.

Oberon, traditionally associated with order in A
Midsummer Night's Dream, causes chaotic activity in this
act.  He has given Puck instructions to anoint the youth wearing "the Athenian garment";
however, Puck mistakenly anoints the eyes of Lysander with the love portion, instead of
those of Demetrius.  When Lysander opens his eyes, then, he falls in love with Helen who
has awakened him after entering the woods in pursuit of Demetrius.  With the potion on
his eyes, Lysander falls in love with Helen, but she believes that he mocks her as he
speaks of his regret about loving Hermia.

When Lysander
does see Hermia, he no longer loves her; he loathes her.  The arguing of Oberon and
Titania has caused  the natural world to be at odds with itself.  In his efforts to
control Titania and bring peace to his marriage, which will effect a settling down of
Nature, Puck's mistake causes more unrest.

Oberon plans to
take the changeling child of Titania while she is under the spell of love. However,
Oberon is unaware that Bottom has entered the forest to practice a play with the other
mechanicals.  An observer of their bungled practice is Puck, who turns Bottom's head
into the head of an ass.  After this trick, Titania awakens, and looks first at Bottom,
falling in love with the man who has the donkey's
head.

What follows is hilarious as Bottom, unaware of his
changed head,  he accepts his position as lover to the fairy queen when she tells him "I
love thee":

readability="19">

methinks, mistress, you should have little
reason

for that; and yet, to say the truth, reason and love
keep

little company together now-a-days; the more the
pity,

that some hones neighbours will not make them
friends.

Nay, I can gleek upon occasion.
(3.1.134)

Bottom banters with
the other fairies, a comical scene, indeed, as a man whose head looks like that of a
donkey criticizes others.