How do I talk to my boyfriend?

Me and my boyfriend were bought up very differently. He was bought up n America and me in England. That on its own is very different.

I told him that eventually when we have kids, i don't want to use physical discipline like spanking as a way to discipline them. This is because, my parents bought me up this way and I have never felt comfortable talking to them about certain topics such as sex, periods, mental health etc. I love my parents but i don't feel like i can talk to them.

My boyfriend was bought up the same with physical discipline. However, he says that he feels like this works and it didn't change anything for him with his parents.

I haven't bought this up with him since and it has out me off wanting kids a little.

I still see a baby, and still want them one day but i am a little more reluctant.

I just don't know how to bring this up with him again. I don't want to offend him, or upset him or make him feel bad or make me feel like his parents were bad.

I just want it to be different with my own children. I want them to want to talk to me about sex and periods and mental health and boyfriends. Something i didn't have with my own parents.
How do I talk to my boyfriend?
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