We want children, but my husband struggles to climax through intercourse

We have worked around the problem and had a fulfilling sex life. But now we are trying for a family, it has become an issue, yet he refuses to discuss itMy husband and I have been together for eight years. Throughout our relationship, he has struggled to reach climax through vaginal intercourse. We worked around this and have had a mutually fulfilling sex life. But now we are now trying for a family, it is causing problems. I have tried many times to talk about it with him, but I have been met w