How we cite our quotes: (Act.Scene.Line). Line numbers correspond to Folger's online edition.
Quote #7
TITANIA
I pray thee, gentle mortal, sing again.
Mine ear is much enamoured of thy note,
So is mine eye enthrallèd to thy shape,
And thy fair virtue's force perforce doth move me
On the first view, to say, to swear, I love thee. (3.1.139-143)
Bottom has literally been transformed into an ass, but here it's obvious that Titania has undergone a transformation as well. Oberon's love juice has turned the once-feisty and intelligent queen into a silly, love struck woman with no ability to judge appearances. Though we know that Bottom's voice and appearance as a donkey are particularly unappealing, Titania's love for him seems to have changed his faults into virtues (in her mind anyway). We remember that Helena said pretty much the same thing about Demetrius's character flaws back in Quote #4.
Quote #8
TITANIA
Out of this wood do not desire to go.
Thou shalt remain here whether thou wilt or no.
[...]
And I will purge thy mortal grossness so
That thou shalt like an airy spirit go. (3.1.154-155; 162-163)
There's a dark element of coercion here, where Titania informs Bottom that he'll remain in the wood with her, regardless of whether or not he wants to. What's more, Titania is ready to use her magic to physically transform Bottom's mortal body into that of an "airy spirit."
Quote #9
DEMETRIUS
Lysander, keep thy Hermia. I will none.
If e'er I loved her, all that love is gone.
My heart to her but as guest-wise sojourned,
And now to Helen is it home returned,
There to remain. (3.2.72-76)
Demetrius has been enchanted, which should excuse him, but remember that this will be his second transformation in love. First he loved Helena, then he loved Hermia, and now he loves Helena again. Though we know this last transformation was caused by magic, he was fickle even before being enchanted.