In Latin, sex is the numeral 6, and doesn't appear to have any other meanings other than as a numeral. Sexus does mean gender, but does not mean 6.
What does sexus mean in Latin?
Sexus (Latin for sex) may refer to: Sexus (The Rosy Crucifixion), a 1949 novel by Henry Miller.
Is English 60% Latin?
Over 60 percent of all English words have Greek or Latin roots. In the vocabulary of the sciences and technology, the figure rises to over 90 percent. About 10 percent of the Latin vocabulary has found its way directly into English without an intermediary (usually French).