Growing up, I had a cousin who was more than a little feminine. He played in my dresses, used to put my tights on his head so he could have "long hair", and he LOVED Barbies and ALWAYS wanted to play them. When we played house, he wanted to be the Mommy (I was very firm about this one, though--I the Mommy and he COULD NOT BE lol Ahhh the life of a six year old!).
My Grandma (who raised him), when people would be shocked, would say of his Barbie fascination, "When a little boy wants to look a girls (Barbies) there's nothing to worry about. It's when little boys want to look at little boys we need to worry". LOL Ooooh Grandma. He always said he wished he were a girl, because girls got PRETTY stuff.
Most little boys, if left to their own devices, will become interested in girl things. Think about it: most little girls are interested in trucks and superheroes and "boy" things at some point, too. It doesn't mean much of anything, other than he hasn't been quashed by the societal constraints we have in today's world.
My cousin, by the way, is now the most loving husband to a wonderful woman and two beautiful children. He's what everyone would consider a "mans man". He's outdoorsy, good with tools, and very masculine.
Of course, he always attends his little girls tea parties, and still plays Barbie with them....
lol!