All of a sudden he follows her like an ox fit for slaughter or like a fool fit for a trap

It is a trap for a person to declare quickly, "This is sacred," and only later to have second thoughts about the vows.

or you may learn his ways and find yourself caught in a trap.

A strong man who flatters his neighbor is setting a trap where he walks.

Fearing any human being is a trap, but confiding in the LORD keeps anyone safe.