The bourgeois want to get a monopoly on sex. They're trying to deprive the people of sex because it develops strong bounds between them. Ancient people knew that warriors were better at war when they fought for the ones they had sex with so soldiers had lots of gay sex. The bourgeois are trying to make the revolution weak by imposing its own bourgeois values on sex : male dominance, procreation-orientedness, non-consensuality, heteronormativity, violence. In one word, as exploiters, they promote exploitative sex. When the proletariat destroys exploitative sex and develops new forms of bounds stronger and healthier between its individuals, class consciousness and collective action power will follow.