Tentigo

The emission of semen is excited by its abundance in the vesicles and by sexual instinct: it is effected by the violent tentigo which prevents the course of the urine, and, as it were, throws the way open for the semen; by a kind of spasmodic contraction of the vesiculæ seminales, […]

Sometimes an obstinate and painful erection takes place, either without appetite, or with great and insatiable desire. To this rare kind of disorder are given the several names, tentigo, priapism, satyriasis. […] that slighter tentigo that is often felt on awakening, by persons otherwise in the best health […]

Moreover, Boerhaave proceeded further than the suspicions of these physicians led him, as he expressly denied that he had ever known true semen to be discharged without a venereal tentigo, either sleeping or waking; so that it must be a very extraordinary disease indeed, wherein this fluid is spontaneously discharged, or without any sensation.

It is an unrestrainable impulse to connection; but neither are they at all relieved by these embraces, nor is the tentigo soothed by many and repeated acts of sexual intercourse.