... how does he feel about talking about / playing with them with other boys? DS is 7.5 and loves dolls of all kinds, including Barbies etc, but has a special love for his baby doll which he cares for as if it's his actual baby. I've noticed that while he's very comfortable taking the doll(s) out and about in public (e.g. taking baby out on the tube in a sling), if he knows he's going to see other children he tends to leave it at home. He does talk to the girls at school but I get the sense he's less comfortable talking to the boys or involving them in his play.
If your son is/was into dolls, how comfortable is/was he sharing with male friends? And how long did it last? It's very cute but I assume we probably don't have much longer left of this phase...