people often look at photos or a person in the street and say "they look like a paedophile". This suggests some extant model or prototype of the paedophile.

What exactly are the absolute defining characteristics which mark out a paedophile?
It usually seems to be:
thick glasses
over 40 years
any others?
I just want to know so I can burn their houses down.

I assume that in reality paedophiles actually have a range of looks.