i Register
In some senses, libertine is marked as historical. Watch for register when choosing this word.
noun
Someone freed from slavery in Ancient Rome; a freedman.
noun
One who is freethinking in religious matters.
Someone (especially a man) who takes no notice of moral laws, especially those involving sexual propriety; someone loose in morals; a pleasure-seeker.
So the truth of the matter is that a libertine in love, if indeed a libertine can be in love, becomes from that moment in less of a hurry to enjoy the pleasures of the flesh.
adj
Dissolute, licentious, profligate; loose in morals.