A man proposed me. And asked to meet my father. He is quite immature in certain things but is into da’wah and is known for his character. But, he often asks me about my private parts, talks about after nikah things, which when I say are impermissible, he claims it’s important for us to talk about it. What should I do? Should I say no?
You are absolutely sinful for talking to him, let alone allowing him to talk such filth!
Forget about him and block him from everywhere immediately as he’s just playing around and would dump you when he’s got what he was looking for in the first place. If he actually was into da’wah and a practicing muslim he would have talked to your father by now and never approached you or talked about such stuff. He is not fit to get married and if he does, he will chase another woman a month later.