Worm Man

Professor Siegfried, the local college’s physics genius, is given to eccentric, even peculiar behavior. He is sure that aliens captured him and took him to another galaxy via a wormhole between two black holes.   He is certain of this because he can feel worm-like structures in his left scrotum. Most disconcertingly, he shows his scrotum to his graduate students and demonstrates that the size of the “worms” can increase if he performs a Valsalva maneuver. He is immediately sent for psychiatric evaluation and a physical that reveals his “worms” are nothing more than a varicocele. 

Questions: Where is the likely site for obstruction leading to the varicocele?

Postscript: Wormholes were theorized by Einstein as hypothetical structures in the fabric of space. They have nothing to do with worms.