Let's start with removing idioms and colloquialism
In a relationship, you need somebody who will complain when you've done something wrong, and not someone who ignores (forgives) your faults.
First, "gonna" is a colloquialism for "going to". The standard future form "somebody who is going to..."
"Call you out" is an idiom meaning in this context telling - sometimes even in a harsh way - that you did something wrong; reacting to your doing.
"let something slide" is an idiom that means overlooking/ignoring some fault on purpose. Say, you were going 80mph on a road with speed limit of 60mph. There was a policeman with a radar, and they did notice you speeding. They did not stop you, no ticket, no fine, nothing - they let it slide. It's not the same as not seeing the fault - it's choosing not to do anything about it.
Your original sentence means that for a successful relationship you need a honest feedback from your partner. If something you do ires them, they should tell you. If you keep doing something wrong and they never protest, it damages the relationship.
Would phrase "How does it look like?" possibly make sense in any situation in English?
Yes. ;-)
An example situation (perhaps, a very rare and a very specific one), in which "How does it look like?" makes sense would help them a lot.
Challenge accepted. Understand this will be convoluted like nobody's business and relies on the fact that there are multiple meanings to individual words in the question. Also, have you seen 'Silence of the Lambs'?
Anyhow, after Buffalo Bill goes through the whole 'It rubs the lotion on
its skin' business, he tells the girl to behave in a certain manner and checks she understands him:
"It looks adoringly up at me, like a pet that loves its master" he
tells her. "Does it look around like a frightened mouse desperately
seeking escape?"
"No" says his victim.
"And does it look at me like a disobedient dog, just waiting for me > to turn my back so it can attack me?"
Again, the girl shakes her head and says 'No".
"So", says Buffalo Bill, "how does it look like?"
"It looks up at you like a pet that loves its master", she replies,
between sobs.
Definitely rare and specific.
I was going to suggest the question may be syntactically correct in Valleyspeak where the word 'like' is regularly inserted in or appended to spoken sentences - "So, like, how does it look, like?" - but I think that would only add more confusion to the issue for people new to the language.
Even so, that's two situations.
Best Answer
They may not be folded in the literal sense of the word, but they are called folded by some people:
As to why, I can guess, but I'm not sure.
However, Longman Dictionary of Contemporary English and Oxford Learner's Dictionaries (AmE) give more specific definitions, which may not match the last image.
fold your hands:
(from Longman Dictionary of Contemporary English)
(from Oxford Learner's Dictionaries (AmE))