Let her be as the loving hind and pleasant roe; let her breasts satisfy thee at all times; and be thou ravished always with her love. The loving hind and pleasant roe - By אילת aiyeleth, the deer; by יעלה yaalah, the ibex or mountain goat, may be meant.
Let her breasts satisfy thee - As the infant is satisfied with the breasts of its mother; so shouldst thou be with the wife of thy youth.