LOS ANGELES - Neil Patrick Harris is gay and wants to quell any rumors to the contrary. "(I) am quite proud to say that I am a very content gay man living my life to the fullest," Harris tells People magazine's Web site. The 33-year-old actor said he was motivated to disclose his sexuality because of recent "speculation and interest in my private life and relationships." Harris stars on the CBS comedy "How I Met Your Mother." He started on TV as a teen, playing the namesake doctor on the series "Doogie Howser, M.D." ___