Why are some major issues not considered senses?

Question

Why are some major things not considered senses; for example:

Temperature

The ability of thought (you can sense things in your head, like temperature, taste, ect)

The feeling that someone is watching you

There's more than that too; but why are only feeling, hearing, seeing, tasting, and smelling considered senses, when there's more main components than that?

Answer 1

A sense is by definition a mean of interacting with the environment and picking up information from the outside.

Feeling hot and cold is part of the touch sense.

Feeling someone is watching you is the result of subliminal cues usually coming from vision (your eyes picked up some cues, but it was not enough for you to realize it--besides feeling observed is not a very reliable sensation, as any paranoid person would claim they are constantly being watched)

Thinking is not a sense, because it is 100% internal; you get your information from touch, smell, vision, taste and hearing; but from then on, it is internal.