How do I say it

I love it when my SO gets off the better he feels the better I feel but he ALWAYS pulls out when he cums even with a condom and I love how he's extra careful but when I asked he even said it himself that it kind of ruins it (then said it's all about the build up but still)

I want to let him know it's okay to not pull out every single time but I don't know how to tell him that I feel like it sounds weird