Quote from Ayatollah Khomeini:
A man can have sexual pleasure from a child as young as a baby. However, he should not penetrate.
A man can have sexual pleasure from a child as young as a baby. However, he should not penetrate. If he penetrates and the child is harmed then he should be responsible for her subsistence all her life. This girl, however would not count as one of his four permanent wives. The man will not be eligible to marry the girl's sister. The complete Persian text of this saying is listed below.
Ayatollah Khomeini in Tahrirolvasyleh, Fourth Edition, Darol Elm, Qom