I would have done the same thing!   Would have politely backed out the door! Hahaha! In general, I look for 45-years plus because I don't want to insult anyone who is younger!   I think ladies put those ages in there for a reason; so they don't have old guys like me writing them letters!  

In the US, my neighbor is 35-years younger than her husband!   That is uncommon here, but they love each other. Would not be my first choice, either (unless stranded on a desert island!) She is a very good cook!  

Ralgar (63) used to complain here that younger women used to lied to him. How young? Twenty-five! Wanted to know how to tell if a girl is lying to him? I told him, if she's 25 and you are 63, she's lying!   Hahaha!

Sometimes we see someone much younger who is very attractive and interesting, lots of common interests, but it's often easier to keep looking rather than try to crash a perceived "age barrier", even though we don't always know what that is.   I approach everyone here the same way. Do you want to be friends? Difficult to be anything more if the friendship thing is off the table. If I say hi, does not mean I'm angling for a better position, but sometimes in the course of making friends, you find much more. Just my opinion.