How we cite our quotes: Act.Scene
Quote #1
Cam. …Your silkworm used to fast every third day, and the next following spins the better. To-morrow at night, I am for you. (1.2)
Camillo is using this insincere excuse to avoid sleeping with his wife. Essentially, he's saying he's not a sex machine—he needs time to recharge his batteries. But he doesn't actually plan on following through the next day—he's too busy fighting pirates or whatevs.
Quote #2
Isab. I do beseech you,
Entreat him mildly, let not your rough tongue
Set us at louder variance; all my wrongs
Are freely pardon'd; and I do not doubt,
As men to try the precious unicorn's horn
Make of the powder a preservative circle,
And in it put a spider, so these arms
Shall charm his poison, force it to obeying,
And keep him chaste from an infected straying. (2.1)
The straying is "infected" because Brachiano might pick up some STDs whle sleeping around. Isabella wants to charm him and re-direct his lust back towards her—but it's too late. The fix is in, and she's gonna die.
Quote #3
Fran. I shall not need; lust carries her sharp whip
At her own girdle. Look to 't, for our anger
Is making thunderbolts. (2.1)
Francisco chastises Brachiano for his lustfulness—and it's doing a fine job of prodding Brachiano into vicious behavior.
Quote #4
Fran… Like mistletoe on sere elms spent by weather,
Let him cleave to her, and both rot together. (2.1)
Brachiano's lustful passion for Vittoria will just lead to death and decay—it's breaking down the social and family order instead of building it up.
Quote #5
Lawyer. What, are you in by the week? So—I will try now whether they
wit be close prisoner—methinks none should sit upon thy sister, but
old whore-masters——Flam. Or cuckolds; for your cuckold is your most terrible tickler of
lechery. Whore-masters would serve; for none are judges at tilting,
but those that have been old tilters. (3.1)
This is more comic relief—"tilting" means having sex. Flamineo is saying that a whore-master (pimp) is better qualified to judge crimes related to lust, since a pimp makes a business out of sex. Also, even though their wives cheat on them, cuckolds are apparently experts on sexual matters, according to Flamineo.
Quote #6
Mont. Oh, your trade instructs your language!
You see, my lords, what goodly fruit she seems;
Yet like those apples travellers report
To grow where Sodom and Gomorrah stood,
I will but touch her, and you straight shall see
She 'll fall to soot and ashes. (3.2)
Even though Vittoria is easy on the eyes, Monticelso claims that she is inwardly corrupt (using the metaphor of the apples of Sodom—a real plant, though they don't actually turn into real ashes: they're just filled with a gross bitter sap). Lust can't distinguish between the way someone looks on the outside and how they look on the inside.
Quote #7
Zan. Alas! poor maids get more lovers than husbands… (5.1)
Zanche is poignantly complaining about how men just want to sleep with her but won't actually marry her because of her poverty and servitude.
Quote #8
Flam. …O men,
That lie upon your death-beds, and are haunted
With howling wives! ne'er trust them; they 'll re-marry
Ere the worm pierce your winding-sheet, ere the spider
Make a thin curtain for your epitaphs. (5.6)
Flamineo claims (in a fairly sexist way) that women are fickle—they'll weep over a man's corpse and find a new lover before his corpse can even start to rot. This seems to be related to Flamineo's suspicion of female sexual desires, which he sees as uncontrollable and untrustworthy.