To be so buddy-buddy with someone that it gets on everyone's nerves and often inhibits the relationships of the two or more people involved in the cunt to cunt. Therefore, the phrase can be altered to add as many annoying parties as needed. For example, a group of five friends who are annoyingly close could be referred to as cunt to cunt to cunt to cunt to cunt. Can also be exchanged with "penis" as needed, though "cunt" still gets across the meaning.
Person 1: Herbert spends so much time with Jessica. He can't even see that his girlfriend is hurting.