I'd say it depends mostly on whether you ended up with any actual injury (scratches or abrasions or whatever), and to a lesser extent, on whether you expected to end up with any.

Hypothetical example: you think to yourself, "I'm going to rub myself raw with this industrial-grade scotchbrite, that'll learn me!" and then you proceed to tickle yourself with one of those white pads that are mostly nylon with no abrasive to speak of. I'd count that as only virtual SI, comparable to drawing virtual cuts on your arms with a red marker.