I agree with you 100 %.
Sex is much more than just sexual act.
It's unity of mind and body between husband and wife, and fulfillment of God's blessing for them.
But, before sex, love should come in this relationship and husband should love his wife as best friend, daughter, sister and finally wife.
The same for wife.
Love should grow until we reach necessary maturity and become husband and wife and parents.
Because people don't understand it we have so many family problems in the world.