Had a mid, no-extras VIP (wasn't looking for any, for a change) with a mid dancer at a substandard club that happened to be on the walk between an event I was attending and my car. Dancer was decked out in what I guess was supposed to be a faux BDSM outfit including black leather (or leather-like) bra, brief, garters and a collar with 2 inch spikes, all connected with chains. Didn't do a thing for me, but I appreciate that she was trying to be sexy.
After the dance, we had the obligatory parting chit chat and she leaned down from her stiletto leather boots to give the obligatory hug. I felt what I realized was one of those spikes pressing into my neck with enough pressure to inflict discomfort. Drove home shitting myself, imagining a hard to explain puncture wound and possibly symmetrically-spaced marks from the spikes on either side. Stopped in a Wawa restroom to look in the mirror and, fortunately, saw nothing.
Still, moral of the story is, if you are at all concerned about errant marks on prominent locations on your body, steer clear of girls with spiked collars. Now, don't get me started on the OTC session the following week when my companion's nails were clawing my back.
While I appreciate and concur with Muddy's remarks in a separate post about the unique pleasures associated with this hobby, it also can have its share of challenges and stresses for those of us on the DL [cue the violins]

