These graphic images from Alienz by the artist Depuceleur make it plain once and for all that the infamous alien anal probes are purely recreational from the alien perspective:

recreational alien anal probes

The unwelcome alien buttsex has got nothing at all to do with procreation. For that, they’ve got an entirely different unpleasant implantation and impregnation procedure that they like to inflict on captive Earth women:

aliens implanting impregnation grubs

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