Once you get the communication and contract going, you are likely to discover that all-too-common problem — desire discrepancy. It occurs in couples of all ages, and contrary to what you might think, it isn't always the man whose sex drive is higher than the woman's. Particularly at midlife, a woman may be coming into her own sexual power just as her man may be feeling less aggressive in sexual relations.
A shift in desire between partners isn't necessarily a problem unless one person feels frustrated or rejected. That's usually the high-desire partner because he or she is doing the initiating yet being sexually scorned.