Mine would be age. I'm 23 but I been told i look like 16/17/18. As for carding, I always have my ID out because I know they will ask. One time I wasn't carded, I was like hell yeah
LOL Oh another story, when I was senior in high school, I was getting graduation stuff, the sales lady asked if I was graduating grammer school. I was like No, I'm graduating HIGH SCHOOL, thank you very much. I just think of it, when I'm 35, I'll look like 25, so its all good