this made me laugh

me and my SO were talking and he asks me if I want his kids. he knows I do its just we've been together for over a year and I haven't gotten pregnant yet. we're ntnp. so I'm like of course I do. he goes "well you got to try better bc I'm already not that healthy (he smokes ALOT) and my men already coming in there half limp. with you smoking cigarettes you just killing them off before they have a chance." I thought it was so funny bc he was limping around the house while he was talking, but I also thought it was so sweet how much he wants to have a baby with me. on a serious note though I am trying to stop smoking, but its hard any advice?