"There is a classic story about the mother who believed in spanking as a necessary part of discipline until one day she observed her three- year-old daughter hitting her one-year-old son. When confronted, her daughter said, "I'm just playing mommy."
"SLAPPING HANDS
How tempting it is to slap those daring little hands! Many parents do it without thinking, but consider the consequences. Maria Montessori, one of the earliest opponents of slapping children's hands, believed that children's hands are tools for exploring, an extension of the child's natural curiosity. Slapping them sends a powerful negative message. Sensitive parents we have interviewed all agree that the hands should be off-limits for physical punishment. Research supports this idea. Psychologists studied a group of sixteen fourteen-month-olds playing with their mothers. When one group of toddlers tried to grab a forbidden object, they received a slap on the hand; the other group of toddlers did not receive physical punishment. In follow-up studies of these children seven months later, the punished babies were found to be less skilled at exploring their environment. Better to separate the child from the object or supervise his exploration and leave little hands unhurt."
Lots more here:
http://www.askdrsears.com/html/6/t062100.asp
The not understanding enough to talk about it applies to spanking See CNN article:
http://articles.cnn.com/2009-09-16/...dy-author-and-research-scientist?_s=PM:HEALTH
"We're talking about infants and toddlers, and I think that just, cognitively, they just don't understand enough about right or wrong or punishment to benefit from being spanked," said Lisa Berlin, the study's lead author and research scientist at the Center for Child and Family Policy at Duke University."
24 Countries have bans or laws against Spanking with Sweden leading the way.