Oh, this is such old, old news! It's definitely John Lennon and it was in someone else's book years ago, I think back in the mid 80s. Maybe that Goldman, or something like that, guy who was bashed for writing this in his book on The Beatles. Supposedly, John was curious and went off on a tryst with him to Spain or somewhere like that. Not sure how long it lasted. There were other accusations too but, of course, I have no idea how valid they are.