For the ladies 21-25 years old---?

My brother in law is currently looking for the one on a dating website and he keeps IMing girls in the age range of 21-25, but he is 34. I keep telling him to look for girls in his age group and he kind of listens for a day, then he goes right back to IMing the girls that in my opinion are way too young for him. What kills me is they never even reply to him and he just keeps finding different ones to IM!! I know all this because his brother (my husband) and I have been given permission by him to keep track of his account. I email him after I see he has emailed young girls and tell him to stop, he sometimes says "ok" but usually doesn't reply. And! He has met SO many girls on there, but he just keeps them as friends (we call it his harem haha) or after he has met a couple nice girls and we think "oh this could be it", he just keeps right on looking. I tell him "give *Suzy* a chance", he says I'm right but it is like an addiction to him, it is sick.

So my question is- if you were messaged by a 34 year old guy and you were 21-25, would you think "ew I don't need a father figure" or would you be interested? He is a great guy, doesn't act 34, but he is. I know if it was me getting IMed by someone that age I would politely decline.

Also, what more could I tell him that I haven't already?

Thanks!