It's normal to go into parenthood with expectations about what your baby's sleeping habits will look like. You go in thinking they'll sleep soundly in their bassinet in your room until they're old enough to be in their own room. Then, once they turn 5 months old, you'll start sleep training and they'll sleep through the night. You'll nurse at night until you deep it unnecessary. The funny thing about these preconceived notions about baby sleep, however, is that they're rooted in some baby sleep myths that are total BS.
Although there is plenty of sleep advice that's rooted in scientific fact (like the idea that you should lay your baby on their back to sleep to reduce the risk of SIDS,) some of the advice you'll receive is nothing more than an old wive's tale or piece of outdated advice. You may hear it from a well-wishing relative, an well-known book, or from unreliable sources, but the myths circulate all the same.
As hard as it can be to sort through the sleep myths and sleep truths, knowing about the following sleep myth to ignore right off the bat can help you establish healthy (and practical) sleeping habits for your family.