actually I would disagree to a point. You can take a person who doesn't have a foot fetish and give them one with the right kind of action. Breaking a fetish I expect is much more difficult. So my point being that if you are not compatible not on the drive of you sexual desire but on say a fetish or something like that perhaps. Then you can learn a fetish and find it enjoyable.

Case in point would be listening to The Joe Rogan Experience. Joe Rogan talks about how he didn't have a foot fetish. Then he went out with a girl who did have one and would do a lot of sexual play with her feet and by the end of the relationship he had a foot fetish. If you are not open to the new experience then you will most likely not develop a fetish that your lover might have.