Discreet mathematics refers to the subtle study of mathematics. Discreet mathematics is characterised by furtive looks in maths textbooks disguised as pr0n and by secret maths lectures held in abandoned warehouses at midnight.
The origins of discreet mathematics can be traced to the 19th century, where young women interested in the mathematical and scientific subjects were unable to openly pursue such studies. Instead, they disguised their math textbooks as lifestyle magazines, and talked about mathematics in a secret code, called Polari.
This became unnecessary due to the total abolition of any form of sexism at all in 1964 by the Ghost of President Kennedy.
Discreet mathematics > pr0n