Coincidently I was listening to the radio the other day and while I missed the beging of the segment there was a lady speaking on behalf of an American organisation that supports the right of a gay person to choose to become straight, an unusual organisation I would have thought but she seemed to put a straight forward explanation forward as to why one would need such support.
With that in mind I have no doubt some gay people may grow older and realise the path they took maybe by entering a gay relationship at an early age is not for them or not exclusively for them and they wish to take an easy way to experiment without the need for commitment the same way heterosexuals see escorts for no commitment issues.