And he didn't think to bring that up, say, five years ago?

Let's c if I can describe how this relationship went. Y'all meet 6 yr ago . Y'all start having sex all the time probably great sex too! You probably almost never turn it down I bet u actually make advances towards him and give him blow jobs! Then some time during the child bearing years . You become to tired to have sex and lose interest in it almost completely . Leaving him frustrated with a hard on more often than not . And the blow jobs the stopped years ago! Am I even close ? I bet I'm dead on! Can u blame him. He realized he's getting ready to commit his life to someone who don't care how sexually frustrated he is! And his days of good sex and blow jobs are gonna be over for ever ! You should have countiunted to sexually satisfy him! Smart man if u ask me