Avoid doing something / avoid to do something

[Soup Chicken]

"She avoids talking to him."
"She avoids to talk to him."

I find the second one rather unnatural, but can someone please explain the rules behind this?

 

[MikeNewYork]

There are many verbs that take either an infinitive or gerund. Some take only one. This verb does not take an infinitive.

 

[Tdol]

It's not really a question of rules. Some verbs take gerund and others infinitives, some with others without to - but this is mostly arbitrary. There is no answer to why- we do it because everyone else does.