How does Shakespeare weave the theme of love in and out of the plot in A Midsummer Night's Dream?

The theme of love is very central to A Midsummer
Night's Dream. In fact, the only time when love is not a dominant part of the
plot line is with respect to the mechanicals as they rehearse the play they wish to
perform before Duke Theseus in honor of his wedding day. However, love even returns to
that plot line when Titania falls in love with Bottom who has been transformed into a
donkey. Therefore, the central theme of love weaves out of the plot line with respect to
the mechanicals but then weaves back in when Titania falls in love with Bottom as a
donkey.

While love is not a central theme with respect to the
mechanicals, passion is a central theme, which is very similar to love. It is very
evident that at least a couple of the mechanicals have a passion for the arts,
especially writing and performing. We can see their passion for the arts in the very
fact that they, a group of uneducated laborers, wish to perform a play. We especially
see Quince's passion for the arts when he undertakes writing the prologues he thinks
will be necessary for introducing the play and the actors' intentions. In addition, we
especially Bottom's passion for the arts when he visualizes himself as a grand
performer, capable of stirring an audience with his lead role, as we see in his lines,
"If I do it, let the audience look to their eyes; I will move storms" (I.ii.21-22).
While passion is similar to love, it is not exactly romantic love like we see in the
rest of play; therefore, the mechanicals' production of the play is one instance in
which the theme of love weaves out of the plot line.

However, the
theme of romantic love returns when Oberon and Puck trick Titania into falling in love
with Bottom as a donkey. Oberon decides to trick his wife with a love potion because he
is jealous of her love for the beautiful Indian changeling boy, which he sees as erotic
love for the boy. We know Titania's affection for the boy is erotic because, as Puck
describes, she "[c]rowns him with flowers, and makes him all her joy," which happens to
be the exact same way she treats Bottom when she falls in love with him (II.i.27). Since
her love for the boy is erotic, Oberon decides to enchant her into falling in love with
the first foul creature she lays eyes on in order to distract her from the boy. Once he
has distracted her from the boy, Oberon can then release the spell, making her fall in
love with himself once again. Therefore, since Bottom from the mechanicals is used to
ultimately patch Oberon and Titania's marriage, we see that the theme of love weaves
back into the plot with respect to the mechanicals.