Kamasutra 2.1.15

2.1.15

tatraitat syāt/ ciravege nāyake striyo 'nurajyante śīghravegasya bhāvam anāsādyāvasāne 'bhyasūyinyo *bhavati/ tat sarvaṃ bhāvaprāpter aprāpteś ca lakṣaṇam//

This opinion is however objected to on the grounds, that if a male be long-timed, the female loves him the more, but if he be short-timed, she is dissatisfied with him. And this circumstance, some say, would prove that the female emits also.