The first of four men to come forward with allegations against former Elmo puppeteer Kevin Clash has filed a lawsuit. In court documents filed Monday night in Pennsylvania, Sheldon Stephens claims Clash used crystal meth and “poppers” before making sexual contact with him when he was 16 years old. The now 24-year-old man says he met Clash at a social networking event in 2004 and that the “Sesame Street” star promised to help him advance his career. Clash’s attorney calls the lawsuit “meritless,” adding that “the plaintiff has already admitted in writing that he had ‘an adult consensual relationship’ with Mr. Clash.” They vow to defend the case “forcefully.”

sources report Sheldon, never accepted the terms of the previous settlement (which required him to admit to “making up” the allegations) has filed a new suit which claims Kevin threw sex parties. Sex parties that included crystal meth and poppers.

Sheldon also claimed that Kevin’s chauffeur participated in the “experience” by allegedly masturbating while watching the pair have sex.

Since Stephens went public with his allegations last November, three other men have come forward with similar claims – and lawsuits. Clash later resigned his post from “Sesame Street.”