What Does 67 Mean in Texting

What does it mean when someone sends you 69?

When two people do a 69 it means they give each other oral sex at the same time, so the position of their bodies roughly resembles the number 69.

What does 65 mean in slang?

65. In prison inmates use 65 (“six five for me“) short for “look out for me”, “look out”, “keep eyes peeled”.