This sounds like one of the many hispanic old wives tales I have heard through my wife's family. Tickling was one of them,
Babies aren't supposed to see their reflection because it will make them vain
Put a red bracelet on the baby to repel evil spirits
Don't let strangers touch the baby because it will transfer jealousy to the baby
There's so many more, and WAY more not baby based myths that I have learned that could fill this thread.
If you tickle a baby's feet before they are one year old they will stutter. Told to me by my son's girlfriend when I was holding my grandson for the first time. It wasn't a fun fact, it was a rule that I was to obey. So for the record, he should be stuttering by now because I couldn't resist, and they couldn't watch me all the time. :)
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