My brother is having trouble finding a girl?

My brother is 25,he's a virgin,and he's trying to find a girl who wants to wait to have until she marries him.He said it doesn't really matter if shes a virgin or not,but he wants to save himself for the right girl,and he wants to wait till he's married.All the guys hbe works with say that he should "try her out"before he married her,and they say there's nothing wrong with premarital .