girls at that age are unstable as shit, and one going after a man in his mid 30's is not a good sign that, "maybe shes one of the few sane ones", you coud be in for a world of crazy-shit, worst case condom breaks knock her up, you do not want a 17 year old who most likely has some family issues deciding whether your gonna be a dad or not, a bust inside a sane 23 year-old and you can most likely discuss the matter to some degree like adults, 17-year old prolly ex-group home resident, who prolly has no dad, not so much
or maybe she just legit wants platonic paternal figure in her life, to give her the attention she never got from her dad?
I personally would not