If you look at the sentences,it is easier for the mind to make sense of the way that I have written it.It is a quicker means of comprehension.

It unclutters the sentence very nicely.Once that you begin to put things down in a willy-nilly fashion,you soon find that it becomes chaotic.

Look at the way IM has trashed so much of the language.If you are unfamiliar with the lingo,you have to stop and figure out what is being said.

English typically limits the insertion of numbers into a sentence.When speaking of temperature,speed or height,it is customary to use digits.

It really speeds up reading and comprehension to do it that way.

That is why there are singular and plural usages in English.

In closing,notice how I inserted IM into this answer.You instantly know what it means and it is smoother than writing instant messaging.

Rule: When you use a number to modify a noun, the noun must agree with the number. Any number greater than one must modify a plural noun.

Ex: I have one dog and she has two dogs.

remember however, that numbers are not always used. you may be able to use numbers up to a certain point, but there are cases in which numbering things will be a hassle.

example:

i have 254 friend.

So pioneers thought that that was a miss use of the language, so they came up with like just adding a “s” instead of not adding a s and classifying at the bigining of how many of apples there was, like i have 2 apple. so pioneers said for plural, ” i have apples” or “i have 2 apples” to be more specific. the came up with the plural name in 1623, following the singulair name in 1640.

My friend Sam has a dog, my friend Trevor has three dogs.

Basically, you put an ‘s’ on the end.

‘My car’ (meaning one car)

‘My cars’ (meaning any number from two up, you have to specify how many)

Hope this helps a bit.

Or maybe “sheeps” sounds a bit hard to pronounce / confusing for someone who is learning English, especially if it was their first language