Being easy to approach.

Not making your spouse feel like every difficult conversation,
question,
mistake,
or disagreement
is going to turn into a storm.

Not immediately reacting with:
defensiveness,
anger,
shutdown,
or intensity.

Because relationships become much more emotionally connected when people feel they can speak honestly,
ask for things,
bring things up,
or admit mistakes —
without constantly fearing the reaction on the other side.

Emotional safety is not only built through warmth and affection.

It is also built through being someone your spouse can actually approach.