Reply to Objection 3: Beasts are without reason. In this way man becomes, as it were, like them in coition, because he cannot moderate concupiscence. In the state of innocence nothing of this kind would have happened that was not regulated by reason, not because delight of sense was less, as some say (rather indeed would sensible delight have been the greater in proportion to the greater purity of nature and the greater sensibility of the body), but because the force of concupiscence would not have so inordinately thrown itself into such pleasure, being curbed by reason, whose place it is not to lessen sensual pleasure, but to prevent the force of concupiscence from cleaving to it immoderately. By "immoderately" I mean going beyond the bounds of reason, as a sober person does not take less pleasure in food taken in moderation than the glutton, but his concupiscence lingers less in such pleasures. This is what Augustine means by the words quoted, which do not exclude intensity of pleasure from the state of innocence, but ardor of desire and restlessness of the mind. Therefore continence would not have been praiseworthy in the state of innocence, whereas it is praiseworthy in our present state, not because it removes fecundity, but because it excludes inordinate desire. In that state fecundity would have been without lust.
Reply to Objection 4: As Augustine says (De Civ. Dei xiv, 26): In that state "intercourse would have been without prejudice to virginal integrity; this would have remained intact, as it does in the menses. And just as in giving birth the mother was then relieved, not by groans of pain, but by the instigations of maturity; so in conceiving, the union was one, not of lustful desire, but of deliberate action."