A dentist is talking to his patient about the sanitary problems some of his fellow dentists were facing.
He said that one of his friends was touring a latex glove factory in Mexico, and saw how they make the gloves.
One person would stick his hand in the melted latex, walk over to a vat of cooling water, then dip his hand in it to solidify the latex. The glove was then thrown in a finished products box.
The dentist's patient was disgusted by the lack of care taken in making the gloves sanitary.
Wanting to keep all the patients he could, the dentist didn't mention how they made condoms.