My favourite thought is tattoos.

If I had gotten a tattoo at 13, it might have been a dick.

At 16, it would have been a unicorn

At 18 it would have been a big arsed, ugly dragon.

At 22 it would have been some sort of occult symbol

(and don't forget all those boyfriend names!)

By 30, I would have been disgusted with all of these,

and now that I'm 60 and watching my skin sag, I'm thrilled I have no ink.

That's just me. But - decisions in youth are often regretful.