system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does a vasectomy work?

I dont quite understand the meaning of it I guess? After a vasectomy, how does a "shoot blank"? 
If the tubes are tied up, does excessive semen not make them burst from pressure? 
Where does the semen go, as it cant really get out of the tubes?
gpt
They're not tied. They literally snip and cauterize the tubes that carry the sperm from the testicles. The semen part of it comes from a different place so you still ejaculate but there's no sperm in the mix.