What do you think of people who pull an "age card"? (Example: "Yeah, when I was 13 I did this, but now I don't. 13 is sooo immature. You'll learn one day.")
How many phone books does your city give out?
I always fill in the blank with an age 10 years younger than what they say they are "chronologically" because I've found that anyone who adamently claims maturity usually isn't.
I also think they are stupid. Sure, we were all dumb at 13 and at 13 we weren't aware of it, but there's no need to demean the way a 13 year old feels just because they're 13. The 'love' (or whatever) someone felt at 13 is just as real to them as anything else.
Mine gave out 3! All different!