With no offense whatever meant to your tattoo, I doubt that was the reason, since most BPs (& many other snakes) just aren't that visually-oriented. This whole episode sounds pretty cute, & I think it was just her day to make a derpy mistake. I don't think your toes are in any danger...now or ever.
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To put this in human terms, have you ever opened your mouth & said something you regretted, then wished you'd stuck your foot in to stop it, but it was too late? This is the snake equivalent- she instinctively reacted to some cues ("warm & wiggling") before realizing that you weren't quite what she was hoping for. Too bad they can't blush, that would have been even better. I think she'll get better at recognizing what's edible.