Part 1: An alien horde whose species evolves through cross breeding identifies you as an ideal candidate for the breeding process, and sends out one of their best to extract a sample. She encourages and instructs you to jerk off to her, and give her a big sample for her tests - giving you lots of juicy visuals and talk of the "injection process" ;) Part 2: After tests it is confirmed that your sperm is top notch and perfect for impregnating a horde of alien women with the next generation. She returns, eager and impatient to coax another sample from you for injections. Part 3: (FYI this is the only part containing feet) In the future, she indulges your foot fetish by "wasting" your sample all over her feet for your visual pleasure.