2. Demi Moore and Ashton KutcherAdvertisement
All’s not eternally hunky-dory in open relationships. Demi and Ashton’s eight-year marriage was reportedly quite colorful, with Demi alleged to have been a bi-sexual (though nothing’s been confirmed) who invited PYTs to share the relationship quite often. But when Ashton took up with Brittney Jones, it was curtains for the marriage. Obviously, there are rules for open relationships – physical, emotional and parameters that both partners set for themselves and each other – and clearly some boundaries were crossed here.