My partner has started withdrawing before ejaculation – why?

We’re feeling our way into our new relationship, and have agreed that children are not on the immediate agenda. He says he pulls out because he doesn’t want kids. Does this mean he doesn’t trust me?After many years, and dancing around the edges, my best friend and I have fallen for each other. We recently confessed our feelings, and are now together. We’re in our early 30s and feeling our way through our new relationship, and it’s wonderful. He is clear he does not