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For nearly three decades, “Project Runway” Mentor Tim Gunn has been celibate.

During an appearance on ABC’s The Revolution Tuesday, the design guru revealed that he hasn’t “had sex in 29 years.”

Gunn, an openly gay man, said he doesn’t feel like “less of a person” because of his non-existent sex life. “I’m a perfectly fulfilled person,” Gunn explained. “But it’s very physiological.”

The Lifetime star, who is also an expert on The Revolution, fought back tears as he explained that his former partner of six years “was impatient with my sexual performance,” prompting him to become abstinent.

Gunn added that he doesn’t believe sex is the most important factor in a relationship. “I’m happy to be healthy and alive, frankly,” he said, according to Us Wekly.