William Shakespeare, Sonnet 144
Two loves I have of comfort and despair,
Which like two spirits do suggest me still:
The better angel is a man right fair,
The worser spirit a woman colored ill.
To win me soon to hell, my female evil 5
Tempteth my better angel from my side,
And would corrupt my saint to be a devil,
Wooing his purity with her foul pride.
And whether that my angel be turned fiend
Suspect I may, yet not directly tell; 10
But being both from me, both to each friend,
I guess one angel in another's hell.
Yet this shall I ne'er know, but live in doubt
Till my bad angel fire my good one out.
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The final line contains, in the metaphor of "fire," a reference to sexual disease.