While this seems that someone is being honest with you, this is just one of their manipulative tactics to make you feel like you need to share your secrets and vulnerabilities as well. This will probably include moments in their lives when they felt emotionally vulnerable, so they can play the victim and make you feel bad for them. You've only known this person for a few weeks or months, and you don't know their favorite color yet, but they've told you an alarming amount of personal information.
He shares deep, personal issues when it's not appropriate. But your partner talks about how wonderful it is that you both agree marriage is outdated and that children only sap and energy so often, convincingly and publicly you start to wonder what it is you have and haven't said you wanted. You still want that in fact, more than ever. You have always wanted to get married and raise children.
Example of making you believe you want what they want as emotional manipulation: