The essence of homosexuality is that homosexuals are heterosexual, and they generally think they are not gay. Under special circumstances, it is very common for the military in western countries to find homosexuals to vent their sexual feelings in order to solve their own physiological problems (our army also has this kind of behavior, but it is not as extensive as that in western countries). Such groups are one-way homosexuals, and their sexual behavior is called homosexuality.
In daily life or on the Internet, the word "homosexuality" is more entertaining. In general, saying that two people are gay can be understood as two people have a good relationship and cannot be separated.
The widespread use of the word "gay" reflects the gradual opening of the national social atmosphere and the increasing ability to accept new things.