Androcupiosappho is someone who might “sexually” consider themself a gay man, but are willing to have sex with women, despite experiencing NO sexual attraction towards women. The reason for sex could be (but not limited to this list): fun, trying to make a baby, revenge, for artistic expression, etc.[1]
It might best fit people whose sexual attraction (in this case, men) is very different from other types of attraction (heteroromantic, bisensual, etc.), so they don’t feel comfortable with the term “gay”, since their other types of attraction are not exclusive to men.