Ok so you've obviously read the title but when I say reading about sex I don't mean reading stories about sex like a novel or erotica, I mean reading information about different sexual practices. So is reading about various sexual practices to satisfy my curiosity sinful?
Hello bobb3456789. Before I was a Christian I used to read books in witchcraft, Though I wasnt practice it in anyway or form, but being interested in something that is sin, like your subject of Sex or sex acts or practices, that could be a concern and a hold on you by the enemy. Because as you read on, you will want to know more, and as you want to know more, and no matter how strong your will is, the enemy will use your interest, and it will tempt you to practice it. Never let the enemy have any hold on you what ever the interest is regarding sin.
Its like a person who interesting in drugs, first the person will be interesting to take the lower end of drugs, and the more he takes them, he will increase the wanting to know more and end up taking harder drugs. before long, he is trapped by the shear of interest. As a christian, we should try avoid thinking about sin, however interesting it sounds or is. because before long. you will fall into the enemy's trap.
I'm not saying you should stop, however, I am saying don't give in to the enemy's way of thinking. we are to abstain from sex,
1 Thessalonians 4:3-4
For this is the will of God, your sanctification: that you abstain from
sexual immorality; that each one of you know how to control his own body in holiness and honor.
so having that interests of sexual Sin, and sexual immorality, may still classed as Sin. Whether you are practicing it or not.