The phrase “which orb is getting the best head” is a jocular way of asking which person or entity is receiving the most oral sex. It is often used in a sexual or humorous context, and has no literal meaning beyond that.
This phrase is not meant to be taken seriously, and any attempt to do so would be misguided. It is simply a playful way of expressing a sexual desire, and should not be interpreted as anything more than that.
