I read your reply to my husband and we were wondering if your husband is taking any new medications? That could cause a reduced drive. Also he suggested that sometimes arousal occurs when the timing for intimacy isn't right. Like during the day when I'm at work (he is at home during the day). Sometimes he is so concerned about completing too soon in an effort to satisfy me. Talk to your husband the only way to find out what's up is to open up to each other. Sex is never the same at every stage in your marriage.