I think many of us do or at least getting into genre's we probably wouldn't have looked at or been into.
Absolutely man, this is totally normal! Porn sites throw incest, beastophilia, and all kinds of unnatural and taboo things our way, even on mainstream sites. The key is not to be ashamed, talking about it and realizing that these fetishes are a part of your addiction will ultimately help you overcome them. No judgement here brother, keep me updated!