That sounds insane to me. Why animals go with wine, I don't know. The average consumer can't tell one wine from another, did you know that?

Benefits of single rooms? Nothing comes to mind. There are positive benefits in a shared room, but in terms of being independent, there isn't anything of value, any skill development that I can see.

I think one or two years age difference is fine, three years is begging the question, and four is not a good idea. There's a big difference between a 12-year-old and a 16-year-old. If you have the space to do it, it's best to give them their own rooms.