#understanding

What is the percentage?

This term became prevalent to use to make genders in relationships more uniform, is that right?

So we don't get caught up in anomalies of same sex persons as a distraction, even opposite sex couples use the term.

One point in time, it was always specified the gender you're involved with ,with the exception of using significant other which can be argued that phrase started the transition. 

But it was more specific than "partner". Society still sees the irregularity in a male saying my boyfriend , so to downplay attention to that, let's muzzle the controversy by homogenizing the language. It also keeps us "politically correct". 

A female saying my girlfriend is a take it or leave it as colloquially it has been expressed differently for some reason usually that a female's girlfriend usually carries no sexual element.

With a male, not colloquially perpetuated. Can anybody share why that has been?

Same sex couples, do you feel shame, embarrassment, not being more specific than saying "partner"?