How would you feel if I told you that I'm thinking of lying about wanting children?
I hope you are joking because why would you lie about something so consequential?
I can't tell you this for sure, but probably to avoid pain.
That's far too serious of a topic to lie about. If this has something to do with your partner, please be honest about this subject.
Fine, jeez relax. You do have a point and I don't really know if I want to have kids.
That is why you shouldn't lie. It will only make matters worse. A good relationship embraces communication, so you should just talk to your partner and see what he wants, because maybe what he wants is the same as what you want.