"I make my wager rather against your confidence than her reputation:
and, to bar your offence herein too, I durst attempt it against any lady
in the world." But in spite of the fact that Iachimo makes his insult
general, Posthumus warns him that:

"If she remain unseduced ... for your ill opinion,
and the assault you have made to her chastity, you shall
answer me with your sword."

From this it appears that the bet was distasteful to Posthumus; it is
not so offenceful to him as it should have been according to our modern
temper; but this shortcoming, an unconscious shortcoming, is the only
fault which Shakespeare will allow in his hero. In the first scene of
the first act Posthumus is praised as men never praise the absent
without a personal motive; the First Gentleman says of him:

"I do not think
So fair an outward and such stuff within
Endows a man but he."

The Second Gentleman replies:

"You speak him far;"

and the First Gentleman continues:

"I do extend him, sir, within himself;
Crush him together, rather than unfold
His measure duly."