I'd suggest a fun, light text to H. How about, "Hey...I betcha you're making a sand sculpture of Goofy! Enjoy your day."
As for H's BD card, my recommendation is to get a card from the kids and you. Then you can insert some WOA on what a wonderful Dad he is and that you appreciate him. Then spritz it, as Fig suggested earlier, with perfume that is a favorite of H. This way it accomplishes three things:
-H will have warm, fuzzy feelings of the family as a whole -It will give the appearance of you not pursuing him if you were to get him an individual card from you...somewhat a distance but yet there at the same time -Pheromones are a powerful association of memories
You can have a small gift for H that shows you're thoughtful and considerate of his interests. For example, if he loves golf, then a new golf glove or a set of tees. Nothing over the top! See where I am going with this?
Let's hold off on the lipstick and save it up for some prime opportunity when it arises. My, my aren't we an evil bunch here!