LOL! Nerve endings in her hair.
Both of my boys dislike when I trim hair because they they think I'm stealing their mojo. Or, they aren't sure what is going on and they are convinced it can't be good. Or, they think a bath is coming. Max will stand up on me and try to kiss his way out of having his feet trimmed.
Jeanie gave great advice. On the other hand, I think of the vet's office and when my boys' have their blood drawn. The techs come in confident and don't wait to build up anticipation. They do their thing and the dogs are fine with it. Maybe the boys are compliant because they are big brown nosers at the vet.