Yeah, they should talk it out first. Regardless of the outcome. It could be a misunderstanding: maybe he doesn't know how to express exactly what he wants or needs.

If things do end up that they each go their own separate way, at least they will have "closure", which can help them move on.

Making rash choice is not usually the best method of decision making. Especially without having all the information. They will have a lot more information about the situation than we do, and they should still discuss exactly what will become of their relationship. Find out exactly what he means about sleeping with other women. Perhaps it's experiences that he feels that he is lacking, or, well, who knows. Only he does. And if I_JUNO isn't sure, and she knows him and the situation better than we could ever hope to, how can we be arrogant and try to make decisions for them?

They need to talk. Communication is what will make, or break, a relationship.