God designed us to bond with one person.

Genesis 2:24 MSG

Therefore a man shall leave his father and his mother and hold fast to his wife, and they shall become one flesh.

1 Corinthians 6:16-18 MSG

There’s more to sex than mere skin on skin. Sex is as much spiritual mystery as physical fact. As written in [Genesis], “The two become one.” Since we want to become spiritually one with the Master, we must not pursue the kind of sex that avoids commitment and intimacy, leaving us more lonely than ever— the kind of sex that can never “become one.”