CF et al -
i too have a problem with haircuts. partly from being touched, partly just having a guy behind me, partly because the step-father (abuser) was such a stickler for haircuts. i found that the female hairdressers in a unisex shop were not a problem for me. (guess it depends on who your perps were.)
other triggers = getting fitted for a tux or suit - all the measuring and touching. if i put the tape around myself and the tailor just reads it, it is not as bad.
public showers - still a problem = unless i can be alone. at camps and so on - i go early or late when no one else is around - but very anxious in case some one else comes along and there is just the 2 of us...
crowds - another trigger - i try to stay out of the thick press of people - along a wall or let the majority go ahead. i may be the last one to the parking lot - but i breathe easier.
learning to live with the triggers has been a big thing for me recently - helpful to hear others discuss it.
"That you are here - that life exists, and identity; that the powerful play goes on and you may contribute a verse. . . What will your verse be?" Robin Williams as John Keating in "Dead Poets Society"