She is planning a date with her current boyfriend.

He lost everything.

After failing, he blamed himself and was biting his own navel (figuratively expressing deep regret).

He nervously gave my hand a gentle bite.

My dog likes to nibble gently.

He forced the dog to clamp the leash with its teeth.

He was slowly chewing the steak.

My boyfriend gave me a gift.

Everyone was surprised by the news.

There is a proverb, 'a cornered rat will bite a cat,' which means that a person driven into a desperate situation will fight back even against an opponent they would normally fear.