my friends say they should be bigger for 19... are they right?

Just turned 18 and I overheard my dads friends talking at my

I'm 19 and my friends are calling me flat... It's true

I'm 19 and my friends are calling me flat... It's true

I'm 19 and my friends are calling me flat... It's true

I'm 19 and my friends are calling me flat... It's true

I'm 19 and my friends are calling me flat... It's true

Let's make every moment feel like a dream come true

I'm 19 and my friends are calling me flat... It's true

i`m 19 and still flat, should i be embarrassed cause of that

I'm 19 and my friends are calling me flat... It's true

I'm 19 and my friends are calling me flat... It's true