Dead Spider
The ultimate way to fully empty the scrote whilst blowing one's load and sending the male into a blissful, euphoric state. This can be achieved by curling the 4th and little fingers (which should be the only 2, not throttling the ferret) and intermittently pulsating them in order to make slight but firm contact with the testes (preferably the right hand nut). This technique, once perfected, has been known to cause multiple days off work in a row.
Man, what a shit week at work I've had, a little dead spider should pick me up for the weekend!