Foreplay is ALL DAY!
There's a fundamental difference between men and women, to which most men don't understand. Here is it: Women are emotional-based beings; whereas men feel they are providers. IF women are not getting the emotional support at the beginning of the day, then guys - you aren't going to suddenly flip a switch and get loving sex at night. That's just the way it is.
If you do your thing during the day, leave her out of your plans - run around with your friends helping them out hauling this or that; stopping for a beverage, then drag your butt home and expect dinner, a smile, and a "gee I'm so excited to see you"....you are most definitely living in some parallel universe that is composed of men stuck in the 50's.
Foreplay, guys, starts the moment you wake up. YOU need to smile, give her a hug, ask what she's doing, any plans, or better yet - what can YOU do for her? Throughout the day, joke with her, kiss her, make her feel special. ASK if she minds if you go and do such and such and remind her that you won't be gone long.
When you return, ASK her how her day was? Can you help her with dinner? Is there anything she'd like done for HER?
Foreplay is all about GIVING, making her feel special, and I guarantee you that YOU will get more in return - not only in the bedroom, but more out of your relationship as she will do the same for you.
Women are the emotional, nurturing creatures of the Universe, and guys - if you don't know this by now it's high time you learn it. If you want more from your partner, start giving more. I would go so far as to say that the partner in your life probably loves sex more than you do - but it's got to be nurtured first thing in the morning, and not 5 minutes before you go to sleep. Oh, and groping ones partner does not count as foreplay. Seriously, animals grope - humans lovingly touch each other. So, go reach out and touch her with the love in your heart. You'll be amazed by the results you get!