Well obviously the participants have to be informed, consenting adults, so they know they might receive placebo. But also obviously you're not trying to convince them all that they have the placebo or things get skewed.
Jeff even said that in his post, I was just emphasising that I never manage to remember the name.Westermarck or Westermark, I think.
Really? I know for me, if I wanted to ignore my genitals, I would do anything but put pressure on them, because then I'd be constantly aware of them.
Though I seem to acclimate to constant sensory inputs less than normal people.
On the topic of uncomfortable crotch experiences, today it rained while I was in class and the seat of my bike got wet.