Okay, There's a lot of variations on this.
There's that old saying about the word 'assume'. Yet these people who make comments like this forget they are assuming, and wrongly I might add.
- Since you crossdress, you must be gay
- Since you crossdress you must be trying to pick up a man
- Since you crossdress you must want to become a woman
What other 'assumptions' have you run into?