 The last was the Landmark's night shift desk clerk.He had met her several times but did not know her.Joplin's significant relationships with men included ones with Peter de Blanc, Country Joe McDonald (who wrote the song "Janis" at Joplin's request), David (George) Niehaus, Kris Kristofferson, and Seth Morgan (from July 1970 until her death, at which time they were allegedly engaged).