We have a very skewed view on boundaries in relationship.
The problem stem from our knowledge on relationship, dating, even sex, has primary been shaped by popular secular culture.
Sex is stripped from all its fullness down to a mere physical act.

The phrase “sex is good” is an overly simplified, ridiculously dumb down understanding of the subject matter. However, this is how popular culture wants you to perceive it.

When we merely see sex as a physical act, we have ignored and neglected all the other goodness God has created sex to be. In turn we have missed out on the fullness of the oneness God intended us to enjoy.

Sex in God’s perspective is the act of union between two beings.

Grounding our theology particularly on Genesis 1:26-31:

Two: By involving two individuals it connotes a relationship. Two also means this act is consensual, it means in mutuality.

Being: We are human beings, physical beings with emotions, with intellect, breathe on by God’s own breath to have a soul and spirit.
There is more than just our physicality.
The act of sex, on the surface, might seem only a physical act, but in all reality it impacts every aspect of our being.

Union: This union between the two beings is not temporary, but permanent.
As part of the act of sex, a certain portion of you gets permanently attach to the other person.
When the two beings unite, when the man and woman join in union, together they reflect the characters of the One.

Hence, sex is good becomes...
Sex between one man & one woman in mutually committed wedded relationship as originally designed by God is good.
Anything else outside of this confine is NOT good.

Nevertheless, understanding this is one thing, living it out is another.

Because we all experience the urge for sex.

Sex drive is normal, it is not evil. Desiring sex is not evil.
Sex drive is God’s way of reminding us to procreate, as part of our human existence. The question is NOT how far is too far?
The question IS how far will I go to live a life only for God?

Purity is to live a life only for God.

2 Timothy 2:22
Run from anything that stimulates youthful lusts. Instead, pursue righteous living, faithfulness, love, and peace. Enjoy the companionship of those who call on the Lord with pure hearts.”

Run away from youthful lust, from sexual temptations.

Pursue a life of purity, a life lived only for God.

Do this in community, for we cannot do this alone.