Picture courtesy/Ashley Graham Instagram account

American model Ashley Graham says one of the ways she and her husband Justin Ervin keep the spark alive in their marriage is by walking around their home without any clothes on. "We like to walk around the house naked together. It keeps things fresh," Graham told the New York Post newspaper. The model has recently joined forces with Marina Rinaldi Denim to launch a new plus-size jeans line, reports femalefirst.com.