This is where you're right! I do assume too much! I love sex. Have never had trouble with it. I can't believe anyone else my age can maintain the "passion" they had as a young person. I couldn't love my wife more than I do. But once a day!?
I remember when I was in college my girlfriend's roommate had a 30 years old boyfriend. She said he fell asleep after having sex once. I could NOT believe it. HAHA.
And it isn't just sex, it's smell, taste, food. My senses aren't what they once were. More than ever, I live in my head. So though I'm not as sexual anymore, I feel more active in other ways. My body was another life, long ago.
You're lucky indeed! Rock on!