"For every sale there has to be a buy..."

Am I the only one in the world that thinks that in a given and posted trade that we see, there does NOT have to be a typical investor selling and and typical investor buying that block of stock we see as a trade?

The Market Makers will buy your stock at their bid price any time they chose, whether or not they have paired up a buyer for that sell, at the ask, or not.

Each trade whether you buy or sell is with the Market Maker, not another investor, right?