Ross discovers a mysterious skin condition on his backside and seeks advice from Joey and Chandler. Even the doctor who removed Chandler 's third nipple doesn't know what it is. As a last resort, Ross pays a visit to a herbalist called Guru Saj. Meanwhile, Phoebe is dating two men at the same time: a hunk fireman called Vince and a sensitive teacher called Jason. On her friends encouragement, she decides to choose. But it's tough as both men prove to be her perfect match. Elsewhere, Monica is suspicious when Pete tells her he has very special news on his return, so she and the gang visit his luxurious home to investigate.