system
Given the following post, respond as if you're commenting on Reddit:
human
[VENOM] Why does Eddie constantly reply out loud to Venom when he can reply mentally?

We saw them talk mind to mind right when they met. Why does he feel the need to reply out loud especially when other people are around to hear it? Just enjoys coming across as a crazy person?
gpt
Im just rereading Forever War and this is a very very minor spoiler. 

The Colonial soldiers have computers implanted in their brains that allow communication, act like a HUD and can download info right to their brains. In that fiction humans go their whole life communicating via language, only when they are elderly and they get a new body with this brain tech in it are they exposed to non verbal communication. They still prefer to speak, its what they know. 

There are a type of soldier who is "woken" up one day with the implant ready to go. All they know is brain to brain communication and despise having to talk verbally to other people, they view it as slow and not nuanced. 

Eddie has spent his entire life verbalizing to external people, the Symbiote knows and prefers to vocalize internally. 

tldr; Eddie has old ingrained habits.