Which are the rhymes allowed?

Which are the rhymes allowed?
The ones you scream aloud?
Or, maybe, only those
that may complete your rows?

You used it, only twice,
(in both poems, being precise)
it's not, indeed, a fault:
sometimes it adds the salt!

What I meant to tell you
is that Poem can transfer
feelings from their sir
to a reader, me too,
only if the author jokes
with them as lovely pets.

I'm sorry to be cruel
my words can drop a tear
but don't think it's a duel:
friends risk but are sincere!
Just close your precious eyes
to let them see inside.