When can I use ING with noun and when i can't? here is example

[binsadan]

Hello

which word is right and why please ( explain it grammatically )?

[ Failing - Fail ] to clarify your purpose is a common mistake with persuasive message.??

thank you so much

[Tdol]

You start- which do you think is right and why?

[e2e4]

/A learner/

Hello
When can I use ING with noun and when i can't? here is example
We do not use "ing" as a suffix to nouns but verbs. When we are doing so we make nouns from the verbs.

to make --> making
to whistle-->whistling
to spy -->spaying

The nouns that are made from verbs adding the ing form we call verbal nouns or gerund forms or simply gerunds.

which word is right and why please ( explain it grammatically )?

[ Failing - Fail ] to clarify your purpose is a common mistake with persuasive message.??
to fail ~ verb
failing ~ gerund

thank you so much

I might have failed in this.
He failed in getting a safe place.

One of my failings is that I am usually not kind enough.
My next failing is that I am weak to tall, have-more-fun blondes.

[5jj]

My next failing is that I am weak to tall, have-more-fun blondes.

That sound very unnatural to me. If I were such a person, I would be more likely to say:

My next failing is that I have a weakness for tall, fun-loving blondes.

[e2e4]

In my dictionary, I've seen different types of blondes such as peroxide blondes, platinum blondes, etc.
How, in general, to say for women that naturally have black hair which is painted to yellow.
Non-natural blondes, maybe?

Thanks