Charak Samhita
हर्षात्तर्षात् सरत्वाच्च पैच्छिल्याद्गौरवादपि। अणुप्रवणभावाच्च द्रुतत्वान्मारुतस्य च ॥४८॥
The semen is ejaculated from the body as a result of these eight factors- excitement, excessive desire, fluidity, viscosity, heaviness, atomicity and
english translation
harSAttarSAt saratvAcca paicchilyAdgauravAdapi। aNupravaNabhAvAcca drutatvAnmArutasya ca ॥48॥
hk transliteration by Sanscript