In the dimly lit spacecraft, the astronaut, clad only in his underwear, finds solace in self-pleasure. His hand glides up and down his cock, the zero gravity allowing him to drift slightly with each stroke. His mind drifts to imaginative alien encounters, their bodies unlike any he's known. He fantasizes about their touch, their taste, their strange, exotic orifices. His orgasm is intense, his cum floating around him in the vast, silent emptiness of space, a private, kinky celebration of his loneliness.