Sirboob I have had similar conversations. they can be annoying at times. Dh gets them all the time, especially at work. most recently one of the managers was celebrating his birthday, sat round a table with all the managers of their store enjoying cake and he said
manager (who's birthday it was) :"26! Ah to be the youngest manager in the building!"
dh: "pardon?!"
other manager: "yeah, Im the youngest here at 26."
dh: "You've got four years on me sunshine!! I'm 22!"
other manager: "No never, you look older than me, plus you are married and have two kids. You are having me on."
dh: "do you want me to get out my driving license to prove it?
other manager just stares in disbelief. after a while;
other manager: "must be the stress of having two kids then..."