actually human mothers also recognize the smell of their babies... in a hospital study done of new mothers, almost half could not identify a newborn photo of their own baby (the study was done in UK-- in many urban hospital in US, the racial groups of the children would be evident by skincolor, eyefolds, and hair, and unless the nursery population was very high, there might not be enough babies of any one ethic/racial group!) but all of the mothers correctly identified which blanket their baby sleep in over night.
mother's often recognize kids clothing by smell as well as by sight, and a curious thing happens when kids reach sexual maturity... they start to stink.. most parents find their teen age kids smell, (and tell them to bath more frequently-) it a build in way to help prevent incest.
parents don't stop loving their kids, but will often complain about how they stink.. and many times encourage the kids to start doing their own laundry, or make other changes, it is especial evident when kids come home from college, and their laundry "stinks"... (girls are less offensive to mothers, boys less offensive to fathers)
the same sort of thing happens with animals. a female tiger will either recognize(by sight) , or be repelled by the smell of her own litter, and will not later mate with one of her own.
(this can be overcome if they are keeped penned together in a zoo or other unnatural places.)
A word for Oct. 5
