Article continues below advertisementMacaulay Culkin has reignited debate about the psychological cost of childhood fame after describing strict personal rules he uses to manage encounters with fans, with sources now telling OK! his aversion to physical contact reflects "obsessive tendencies" shaped by a life once dominated by others.Culkin, now 45, became one of the most recognizable child actors in the world after starring in Home Alone in 1990, followed by years of intense scrutiny that continued into adulthood.