Srimad-Bhagavatam: Canto 3 - Chapter 1 - Verse 23

Sanskrit:

देवोऽदेवाञ्जघनत: सृजति स्मातिलोलुपान् ।तएनं लोलुपतया मैथुनायाभिपेदिरे ॥ २३ ॥

ITRANS:

devo ’devāñ jaghanataḥsṛjati smātilolupānta enaṁ lolupatayāmaithunāyābhipedire

Translation:

Lord Brahmā then gave birth to the demons from his buttocks, and they were very fond of sex. Because they were too lustful, they approached him for copulation.

Purport:

Sex life is the background of material existence. Here also it is repeated that demons are very fond of sex life. The more one is free from the desire for sex, the more he is promoted to the level of the demigods; the more one is inclined to enjoy sex, the more he is degraded to the level of demoniac life.