If a second conscious head grew out of your shoulders, should you have the right to chop it off?

[haxxiy]

Soleron said:

It's an abortion metaphor right? The juice drink is sperm, and the five months is pregnancy.

It's identical to spider alien if said spider alien is also concious. It's just unattractive.

There is a flaw on the logical structure of your argument. The inference it's structurally invalid.

By way of analogy you could argue if it's doable to kill the alien spider if it annoyed you, you can also kill a living person who does the same, and argue similarly ad infinitum.