In a sexual relationship, the overall ratio of fellatio performed to cunnilingus.
Dave: Yo man, my girl just dumped me. I don't know where I went wrong.
Jeremiah: What was your fellatio ratio?
Dave: It was about 1 to 4
Jeremiah: Well, there's your problem. It should be 1:2 at a minimum. 1:1 is ideal. You need to satisfy your woman, playa.
Dave: But it strains my neck!