Whether chastity is a virtue?

Objections

Objection 1 : It would seem that chastity is not a virtue. For here we are treating of virtues of the soul. But chastity, seemingly, belongs to the body: for a person is said to be chaste because he behaves in a certain way as regards the use of certain parts of the body. Therefore chastity is not a virtue.
Objection 2 : Further, virtue is "a voluntary habit," as stated in Ethic. ii, 6. But chastity, apparently, is not voluntary, since it can be taken away by force from a woman to whom violence is done. Therefore it seems that chastity is not a virtue.
Objection 3 : Further, there is no virtue in unbelievers. Yet some unbelievers are chaste. Therefore chastity is not a virtue.
Objection 4 : Further, the fruits are distinct from the virtues. But chastity is reckoned among the fruits (Gal. 5:23). Therefore chastity is not a virtue.