What if a single toothbrush existed in the whole entire world. If that toothbrush was private property, one man would own that toothbrush, and nobody else would have the right to use that toothbrush any which way they want, unless they got owner's permission. This however, would allow the single individual, to subjugate the labour of all people who want or need that toothbrush.
This scenario is absurd because you might ask, why would we only make 1 toothbrush? The answer to that is, we won't. However, this question is no more absurd than the question "So this means I can just use your toothbrush?" Communists are not coming for your toothbrush!