Yes, it's happened to me.
I was in a relationship for over five years with a woman who accepted my love of tickling, particularly her feet.
During that time I fulfilled every tickling fantasy I'd ever had except for putting her in a magician's box with her feet sticking out one end.
At first, she claimed that she hated the tickling, but later confessed that she had grown to enjoy and look forward to it. In my mind, I can still hear her exploding in laughter as I tied her wrists to the bedposts or handcuffed her hands behind her back. I still see those beautiful soles scrunched up in a vain attempt to defend against my evil fingers.
I have no special insight as to what one does after the relationship is over; all I can write is that I'm grateful I could live out my fantasies. I hope I can find someone else to share those things with, but, if not, life continues.