A landlord is a person. The only difference between him and any other person is that there exists a sheet of paper in an office somewhere which has both his name on it and the address of some specific building. The tenant is also a person. The tenant lives in the same building mentioned on that sheet of paper. Usually, the landlord does not do any actual work, whereas the tenant does. The tenant works, but then gives half of his income to the landlord. If he did not surrender his income, the landlord would call the police, who would then remove the tenant from the building where he lives. Incidentally, the police also keep track of that sheet of paper.
One man works. The other does not. Because of the sheet of paper, the man who works has to give half of the fruits of his labor to the man who does not. The man who works lives on the other half of his income which remains leftover. The man who does not work, therefore, lives because somebody else is working.
The tenant has to work to support both himself and the landlord. Strangely enough, it is invariably the landlord who enjoys a higher standard of living, though. This is because the landlord usually has many different tenants all working to support him. Who is the parasite here?
The bourgeoisie, however, uses another term to describe this parasitic relationship. They call it an investment. A rather strange word, indeed.