1. EXPERIMENT
“Used to” indicates past habitual action; it’s pretty weird but
you can get used to it. “Going to” indicates future intent or
expectation, which should give you an idea where I’m going to.
2. CONTROL GROUP
On the other hand, to it is not something you can be used
and it is impossible to have an idea to where I’m going.
clue:
The serious point is that people learn languages without
negative examples.