Get a large roll of duct tape and put some over your mouth!!! (okay, IMAGINARY duct tape).
He's an adult, he has to make his own decisions about time management, if he thinks he can do both, you will be perceived as controlling and bossy if you butt in. My H always tries to cram too many things into too small a time slot - and you know what? It's not MY job to police him! Yes, I know, you think it will cut into this evening out that you have such high expectations for. Don't forget one of the big rules of DBing - LOW expectations, high PMA. You're about to go into this date with just the opposite - trust me, it won't get you where you want to go.