Well. Yeah. I mean thoughts come from our brains. They don't necessarily come from outside events. Why do some people find BDSM to be incredibly sexually exciting while others find it repulsive? Who knows? But liking BDSM doesn't generally come from a history of having been bound, whipped or otherwise hurt in childhood. Some people just seem to be wired that way.

I think that if you deeply suspect that you were sexually abused, that conviction/suspicion alone is worrying and merits time and attention with a good therapist.