@GidgetGirl Of course love is fun. I never said that it was immature, but I did say that your description of the relationship doesn't sound like a mature loving relationship. I am (gently) agreeing with @ElizabethMainwaring, you do sound shallow and it is nothing to do with the age gap/goatees comments and everything to do with comments such as 'it's the best sex I have ever had, and I have had a lot of sex' (No judgement at all there, I love sex and it is very important to me, but I wouldn't use it as a justification for my relationship), or young flesh and material gains.
I just can't shift the gut feeling that part of the attraction to you is imagining the shock or disbelief of people, as much as I would prefer not to believe that, and that you are missing the point of people's disbelief. It's nothing to do with cliches or attraction and everything to do with the practicalities that you are quite dismissive of.
Old age is a serious thing, you never know how much care and assistance you will need. (True of any age, of course, but it's a given that it will happen eventually). In my life right now, I have my neighbours with a ten year age difference, at 65 she is super sprightly and at 75, he has Alzheimer's. He's fine to have a chat too but can become very anxious. It's very very very hard work for her and she has given up her social life because it's too distressing for him. As I said previously, my dad is slowing down massively, and very suddenly. He retired before he was 50 and had a great life, lots of time on his boat and motorbikes, with his friends, exercising and being with his dogs. My good friends father, aged 62, having never smoked or drank to excess suddenly had been diagnosed with stage four cancer and has 6 months to live.
Of course, this absolutely might not happen, and there are many examples of people who live a right old age with only a few minor issues.
My point here is most people enjoy the opportunity building memories and relationship together, growing together and so by the time they have to face old age, there is a lot of love and shared intimacy between them to fuel them through these challenges. And you are choosing to accompany him in this part of his life, during the best years of your life, willingly. I am not saying that you are wrong, just that is what I am struggling with because I know that I would not want that for me and my life (I was faced with that choice, and I chose my DH because he is only 4 years older than me and the logistics we have discussed, and over the last 18 years, I have never regretted that decision).
But anyway, we are all different and it's noones business but your own. If you are willing to work through not just the bad but the absolute shittest of times with your loved one, then yes, that is a committed relationship and as I previously said, all the best.