The original question was, " what could you do to show throughout the day or week to show him sexual desire, appreciation or validation? " That wont lead to sex.....
So, I have some of those......... lol As for more explicit things, have those too, but lets try these.lol ( loved this post btw )
These are things I use to do. I'm the HD of the marriage, so I don't anymore, but here they are
1) Use to send sexy notes in the lunch box for work. Sometimes even put one in the sandwich so he's accidentally find it. Guys at work would see, but I think he secretly liked that.
2) One day Id send a picture of myself either in the pocket of this jacket, or the lunchbox, or jeans............ Fully clothed. On the back it would say, : hey you, or hey sexy.. Watch for more. A day or 2 later, a picture me without something on. Very innocent at that point. THEN.......... take it as far as you want from there. He will be dying to get the next day, and the next photo. It will put a smile on his face for sure, and doesn't lead to sex, just appreciation. Well, maybe until the last day. Then he might come in and jump yah lol
3) During the evening, ( kids are awake ) Just brush by him, maybe whisper something in his ear like : You LOOK to hot today. Little comments that will peek his interest and or just bring a smile to his face. ( I use to kiss my hubby and bite his bottom lip slightly and say > " too be continued "
So, there's a few that don't necessarily lead to sex, but just show love etc.
Guys at work would see, but I think he secretly liked that. 
