Dead giveaway

Today i met up with a relative stranger whom I've only had contact with via email and over the phone.
While making small talk, Catechol asked him abt his age.

He replied "oh i'm the same age as her!" and pointed a finger at me and extremely confidently, announced: "you're 25 right?"
I recoiled in shock, and tried very hard to hide the look of abject horror on my face, thinking 'you mean it's so early to tell my age??!! I've always felt 18 at heart thank you very much!'

It was only after we parted ways that i finally got it...

And realised my mistake 10years ago, when in setting up my email account and Gmail asked me if i wanted to add my birth year to my user name cos my user name was in use already, i shouldn't have agreed so readily.

Catechol suggested that i change my email to username1995 which might last me for teh next 20 or so years before i have to change it again