Midrash

In other stories of the midrashim, Adam, in penance for his fall, abstains from sexuality for 130 years, but he is not able to control his nocturnal emissions; in his dream state female spirits, the succubae, come and have intercourse with him, and with Adam's seed they give birth to demons.

Midrash was not a purely intellectual pursuit and study was never an end in itself: it had to inspire practical action in the world.