Shiva Purana
स्त्रीष्वध्यासितचित्तस्य ये पुंसः शुक्रबिन्दवः ॥ ते सुखाय न मन्यन्ते स्वेदजा इव ते तथा ॥ ५५ ॥
The drops of semen of a man whose mind is dwelling on women do not bring him pleasure. They are like his own sweat drops, mere dirt.
english translation
strISvadhyAsitacittasya ye puMsaH zukrabindavaH ॥ te sukhAya na manyante svedajA iva te tathA ॥ 55 ॥
hk transliteration by Sanscript