Since CBT is most effective for trich, you could tell people you are taking "classes" if you get in a corner (but classes in what? LOL). I guess I'd imply that they were "remedial"/makeup classes or some new-fangled :-) "behavior modification classes like ones for stopping smoking" and just not say what the behavior was.

Think of a T as being like a teacher, too (which they are to a certain extent) and you're getting one-on-one tutoring. It can be very pleasant/interesting.

http://www.mayoclinic.com/health/tri...mania/DS00895/