DEAR ABBY: I am the 18-year-old daughter (and third child) of parents who are going through a divorce after being together for 36 years. I need your insight on this because I am unsure. My father has always craved physical love and affection, whereas my mom is more like a cat who prefers separation and independence. Even with these differences, things used to be good between them. That was until Mom decided she wanted to stop having sex due to her age and no longer enjoying it. (She also quit drinking, which he didn’t like.) My father was very upset with this and claimed it was abuse if she di…