Now that Bridget the Midget is aging out of porn (she was the go-to girl if someone needed a midget in porn for decades) porn does really need a cadre of midgets willing to perform sexually. They will probably not ever be a mainstay in the biz but there will always be scenes where a midget would improve the scene.
The last movie i seen involving midgets had both a male and female midget enter into the action the scene already had group action going on and although only a brief part they played it did not stop the male midget getting sucked off by a hottie while the female midget gave Steve Holmes a BJ until he came over her face.