In which lines of Othello does Othello mention to Iago that he is inexperienced with women and the domestic world?
These lines are from Act 1.3.94-105.
Othello first admits his inexperience with women and the domesticated world as he is called before the Duke and is defending himself against Brabantio. Othello says that
Rude am I in my speech,
And little blest with the soft phrase of peace;
For since these arms of mine had seven years' pith,
Till now some nine moons wasted, they have used
Their dearest action in the tented field,(95)
And little of this great world can I speak,
More than pertains to feats of broil and battle;
And therefore little shall I grace my cause
In speaking for myself. Yet, by your gracious patience,
I will a round unvarnish'd tale deliver (100)
Of my whole course of love: what drugs, what charms,
What conjuration, and what mighty magic
For such proceeding I am charged withal
I won his daughter.
Here Othello admits that he is unaccustomed to the soft speeches of the civil populace and women specifically.
At the end of his defense, Othello states that "she loved me for the dangers I had passed, / And I loved her that she did pity them" (1.3.193-4).