I wouldn’t find it creepy, though I probably wouldn’t mask my surprise well if I heard about it. My parents are 18 years apart. There are some social differences but at some point, they must have liked each other enough. They also have differing interests. They’re free to do their own thing (my dad stays home my mom travels the world). But, they’re not a great match anymore (I have to believe they used to be). All of this has combined into a strenuous situation where my mom is planning for her retirement freedom while my dad is probably headed to some kind of assisted living because she’s not going to stay home as a servant. I hate to be a downer about a relationship that hasn’t even started, but I think it’s important to consider this aspect before things get serious