Whether impotence is an impediment to marriage?

Objections

Objection 1 : It would seem that impotence is not an impediment to marriage. For carnal copulation is not essential to marriage, since marriage is more perfect when both parties observe continency by vow. But impotence deprives marriage of nothing save carnal copulation. Therefore it is not a diriment impediment to the marriage contract.
Objection 2 : Further, just as impotence prevents carnal copulation so does frigidity. But frigidity is not reckoned an impediment to marriage. Therefore neither should impotence be reckoned as such.
Objection 3 : Further, all old people are frigid. Yet old people can marry. Therefore, etc.
Objection 4 : Further, if the woman knows the man to be frigid when she marries him, the marriage is valid. Therefore frigidity, considered in itself, is not an impediment to marriage.
Objection 5 : Further, calidity may prove a sufficient incentive to carnal copulation with one who is not a virgin, but not with one who is, because it happens to be so weak as to pass away quickly, and is therefore insufficient for the deflowering of a virgin. Or again it may move a man sufficiently in regard to a beautiful woman, but insufficiently in regard to an uncomely one. Therefore it would seem that frigidity, although it be an impediment in regard to one, is not an impediment absolutely.
Objection 6 : Further, generally speaking woman is more frigid than man. But women are not debarred from marriage. Neither therefore should men be debarred on account of frigidity.