Three cousins and their deaf grandma

Three cousins are sitting on the balcony with their deaf grandmother.
The first cousin says:

- Girls, I've heard that this year, gloves will be worn up to here, and she shows her wrist.

- No, I've heard that gloves will be worn up to here, says the second and shows her elbow.

- No, you're wrong, I spoke yesterday with my friend who works for a top fashion designer, and she says that gloves will be worn up to here, says the third and shows her shoulder.

Finally, the grandmother says:

- Girls! The important thing is to be a good guy! Nothing else matters!