1. The trade of goods between early Europe and the Americas that resulted in large cultural and material gains for European countries widespread disease in the unprepared American native tribes.

2. When a long term partner takes advantage of the other by not telling them about their herpes.

Got the covid-19 vaccine

The unfortunate situation when two groups of biddies that you have been hanging out with separably finally meet each other and the lines of communication open. Just like when Columbus found North America and the Western and Eastern hemisphere exchanged large amounts of communicable disease.

When two men masturbate while facing each other so that their semen strikes each other midair.

The act of fingering a girls ass while receiving a hardcore yet very satisfying blowjob.