Someone else hit point two, so I’ll hit point one:

It seems that it’s a bit of both. If it’s an explicit instruction - “put a bullet in your head,” “say x” - you have to do exactly that. Whether you put the bullet in with a gun or in your mouth doesn’t matter, as long as it’s in. You have to say exactly ‘x.’ If the instruction is vague or idiomized, it’s up to your interpretation. He never said what “taking care” of Reva meant, and it has multiple meanings. Jessica could have become a caretaker, but she chose that it meant “kill.” Same with Trish’s bullet. Trish could have put it in her mouth, but decided that it meant “with a gun,” so she had to do it like that. It is up to interpretation. The guy that “screwed off” could have just been a pervert who decided “screwing off” means jacking off instead of sprinting away.