Although currently frequently used as a synonym for sex, gender has a much broader historical meaning. In the original French version genre, it denoted distinctions along any line. The dominance of one to whom the other submits. In our universe, polarities are not two diametrically opposed absolutes. They are really the opposite ends of a spectrum of a single characteristic.
Love is the polar opposite of non-love.
So, on the spectrum of love there is no position completely without it. In between are all the gradations of love. Hate has its own spectrum. Another way to describe the spectrum is nearly wholly masculine to nearly without masculinity or nearly wholly feminine to nearly without masculinity. In practical terms, this means that there is some feminine in everything considered masculine and vice versa.