Let me make one note, the "consumer" version of the Oculus isn't exactly publicly available yet, the dev kit is in excess of $300 according to Wikipedia, and it's rumored a consumer variant is going to be less than $300 but probably still *very* expensive.
For a free game, I don't think it's worth having sexsim recoded to support the Oculus Rift and other such devices, however, if they *do* create a version of Sex Sim that includes support for Oculus, they're going to probably have to charge people for the game, then, as a separate variant of the game that supports the Oculus devices, and such...