maxx, good point -- I think the image is of smoothness, a kind of synesthesia replacing the smoothness of an infant to the smoothness of taste, but the maternal feelings evoked aren't a great match for the predominantly male pipe smoking population. Or that's my take.
I haven't had Dunhill's BB nor Russ' match, but I am really impressed with Russ' version of Walnut, which is Chestnut in their HH Midtown series. There are six tobaccos in this tub tobacco. It's non-aromatic, the only non-aro in the series, and it keeps luring me back. If you're skeptical, try it in the pouch before you order a tub. I took the leap and ordered the tub, and for my purposes, I wasn't wrong.