Theravāda Vinayapiṭaka
Parivāra
1.5. Monks’ Analysis: on Origins
Of the six origins of offences by how many origins do the offences for one indulging in sexual intercourse originate? … They originate by one origin: they originate by body and by mind, not by voice …
Of the six origins of offences by how many origins does the offence of easing oneself … out of disrespect originate? … It originates by one origin: it originates by body and by mind, not by voice.
Concluded is the Fifth Chapter: that on Origins