Hello and welcome! I recently had to go through this conversation with my husband-we just last month decided to start officially trying to conceive #4. He was not quite closed to the idea, but he felt like we have three great kids and why do we need another. He was looking for a logical explanation and I couldn't give him one. For me, I am so insprired by my kids because they each have such special things about them that make me want to be a better person. I really enjoy being around them, and it's so cool to see an extension of your being walking around outside your body. Plus, my family is so important to me and I am excited to get to experience one more child. So, like you said it's a feeling in your soul, nothing you can give a real "reason" to like my husband was looking for. Anyway, it took awhile to get him on board but now he is going along with it willingly and happily. Sometimes I think it is harder for men to envision life with another little one but once they get here they are fine
Anyway, good luck to you on your journey!
Kayla (5), Kenley (3), Tyler (1), ttc Baby #4