Depends on what you want.
If you want an exclusive relationship make sure he's up to it (I.e. Not married, is single, not a player, interested long term).
If you want something casual just go for it.
However, I agree with what Shh! said. Chances are in favour of 37 year olds being physically into 23 year olds. Chances begin to fade dramatically of them wanting a long term relationship with someone they may deem as immature or not in their league. However, this is going into a generalization area, most aspects will depend on the individual in question.
Don't cry, don't regret and don't blame
Weak find the whip, willing find freedom
Towards the sun, carry your name
In warm hands you are given
Ask the wind for the way
Uncertainty's gone, your path will unravel
Accept all as it is and do not blame
God or the Devil
~Born to Live - Mavrik~