Sam had never been very girly or feminine. She had always kept her hair vaguely longish, but usually brushed it and left it at that.
So it was a mystery to her that Little Sam always came up to her to do her hair. She wasn't sure why Little Sam wouldn't go to her Da instead, who on the times he was allowed by Little Sam to do her hair, he did it up impeccably, having learned through years of association with other women the mysteries of braiding and curling and other fiddly things like that. Hell, when they had some Society do, it was Saul who did Sam's hair into a braid or a ponytail. [1]
But every day before Sam left for the Watch House, it was her that Little Sam would come tromping to, brush in hand, asking her Mummy to do her hair. And Vimes loved Little Sam very much.
So every day Little Sam was thrilled to get a crooked ponytail from her mother, or a braid with half of the hair curling out, and Vimes, while still puzzled by the whole thing, did enjoy the quiet moments spent with her daughter brushing and wrestling the mass of Little Sam's hair [2] into place.
[1]: Though that was about it, no matter how fancy or nobby the occasion. Sam had her limits.
[2]: Sam, who had thin, stringy hair, was told by Saul that his hair used to be like Little Sam's before he had to start shaving it to work with the dragons.
