Forget slut-shamming. Sir Richard’s Condoms and the ad agency TDA_Boulder are using the Rush Limbaugh/Sandra Fluke flap to encourage the Georgetown law student’s supporters to embrace their inner and outer slut.The effort to mock Limbaugh includes a “Sluts Unite” website and social media campaign, which urge supporters to change their social media avatars to one of their 24 slogan-logos. Popular picks include “In Sluts We Trust,†“Proud Father of a Slut,†“You Can Call Me Slut,” “I Believe In Slut,” and “Pro-Slut.â€Naturally, the Boulder, Colo. companies have topped off the campaign with an oath for unified sluts:I believe that sex...