a lot of NTs are uncomfortable with being stared at. it's not always bad, but it helps if there's context for them to interpret the staring. some NTs (also NDs) may jump to a conclusion that you are thinking negative thoughts about them when staring silently.

it can be beneficial to look away, at least intermittently. one continuous 3s stare can be worse than 2 separate 2s stares.

these are not strict rules though. it should be adjusted to the context of the situation and the preexisting relationship (if it did exist).