A lot of people Christians from both Catholic, Orthodox, or even Protestant groups who are single and obey God’s word do not engage in sexual activity even with themselves.
Natural Family Planning is not about not having sex it’s about spacing the amount of children and taking natural precautions when your hands are more than full.
Not to be crass but I was a sex addict I had a huge problem with pornography and even when I got over that I was still a sex addict.
That’s what our society teaches is normal and everything is good in excess but if you have moderation then it’s considered deficiency.
What the church teaches about marriage is that the purpose of marriage is to love God with one another and for the purpose of having a family.
The church teaches that sex is morally good in a marriage, open to life, out of love and not lust and in moderation.
Some people go weeks, months or even years without sexual activity in a marriage because they choose to and not because there’s anything wrong with them or their marriage.
You’re not going to die if you don’t have coitus.