When two people fuse through the fusion dance, or the potara earrings, the newly fused product leans to the characteristics and personalities of the two former subjects, but they do not submit to their control. The only character who ever submitted to control was super Gogeta, who had no choice.
The pupil is a hole located in the centre of the iris of the eye that allows light to strike the retina. It appears black because light rays entering the pupil are either absorbed by the tissues inside the eye directly, or absorbed after diffuse reflections within the eye that mostly miss exiting the narrow pupil.
Different Sized Pupils (Anisocoria) in Cats. The pupils are the black opening located in the centre of the eye which expand and contract depending on the amount of light. In low light, they expand, to let more light into the eye, in bright light, they contract to let less in.