Shaggy and Fred Probed by Aliens

It was a dark stormy night, when otherworldly light shone through the windows of the motel room. Seconds later Shaggy and Freddie found themselves naked and spread on a cold metal aboard a spacecraft. Scared and shaking, they heard a weird buzzing behind them, but could not look back. Strange liquid was poured onto their butts, trickling down the scrotums and shrunken dicks. For a few long seconds nothing happened. And then, without a warning, both felt piercing pain, as thick pulsating probes were pushed violently deep inside them. Alien machines were scrupulously studying Scoobies from inside, throbbing with curiosity. Imagine Shaggy's surprise when he turned his head and saw Fred enjoying the whole procedure...