In fact, many spouses buy life insurance on one another. Especially, if they own a house, have kids or rely on their spouse's income for financial support.
If you are married, you have an "Insurable Interest" in your spouse, which is required to buy life insurance on another person.
Whether or not you both work, you may find it a good idea for both you and your spouse to have life insurance to protect one another and your family.
Learn more about life insurance for your spouse.