Teaching Torah to Wopmen - to benefit Women or Torah?

 Sotah (20a) She had scarcely finished drinking when her face turns green, her eyes protrude and her veins swell; and it is exclaimed, remove her that the temple-court be not defiled if she possessed a merit, it causes the water to suspend its effect upon her. Some merit suspends the effect for one year, another for two years, and another for three years. Hence a man is under the obligation to teach his daughter Torah, so that if she has to drink the water of bitterness, she may know that the merit suspends its effect. R. Eliezer says: whoever teaches his daughter Torah teaches her obscenity. R. Joshua says: a woman prefers one kab and sexual indulgence to nine kab and continence. He used to say, a foolish pietist, a cunning rogue, a female Pharisee, and the plague of Pharisees bring destruction upon the world.