Dolly Parton believes her "warped sense of humour" has been essential in maintaining her 56-year-long marriage with husband Carl Dean. She credits their ability to laugh together as a key factor in their lasting love. The couple rarely engage in serious arguments and have never said hurtful things to each other. Parton also mentions that they have separate interests and enjoy spending time apart. She surprised Dean on his birthday by recreating her iconic Playboy cover from 1978. Parton said the surprise brought joy to her husband and others as well.