Want to make him speechless! help!

Help! I am wanting to do something to make my husbands jaw drop and possibly make him blush! We are going on a much needed date next weekend after having our 2nd baby two months ago. And I wanting to do something racy and sexy to catch him off guard. Idk what we are doing for our date yet but I want to do something while we are out that will just make him lose his mind. I have never been very adventurous or out here if you will so I have no idea what or where to start.