Answer: the early Neoplatonists were pagans, many Neoplatonist ideas influenced both mainstream Christian and Gnostic beliefs. Neoplatonist beliefs are centered on the idea of a single supreme source of goodness and being in the universe from which all other things descend.
Neoplatonist means a philosophical system, originated in the 3rd century a.d. by Plotinus, founded chiefly on Platonic doctrine and Eastern mysticism, with later influences from Christianity. It holds that all existence consists of emanations from the One with whom the soul may be reunited.
Because it would go against natural laws. We are governed by God, God made humans in a way that they would be able to reproduce by sexual interaction not by scientific means.