They are scared of being outed in case their sales are affected. It's very much a case of 'the lady doth protest too much, methinks'.
So, with this in mind, which rap superstar started dabbling with male escorts in Monte Carlo last year? He enjoyed himself so much that he returned again this summer.
He called up the escort agency, put through his order and waited for them to show up. Unfortunately proving the rumours that he's on his uppers, his credit card was declined and the agency cancelled the 'date' before the escort showed up.