How do I stop my friend from going to the gay pride parade?

Ever since my friend went to that Lady Gaga concert and started sucking at sports, I knew something was wrong. My friends and I went through his stuff and we were shocked to find out that he has a membership discount to Victoria’s Secret and a “Barebacking for Dummies” book. Now he’s been using words like “super” and “fabulous” pretty frequently. We think if he goes to the pride parade his condition will get worse. How can we help him before it’s too late?