cross-posted from: https://piefed.blahaj.zone/c/lemmyshitpost/p/403453/this-one-goes-out-to-dennis-prager
I think this is referring to this
https://www.sciencealert.com/scientific-first-mice-with-two-fathers-now-have-offspring
I'd direct you to some pron sites, but they tend to use the wrong orifices a lot which would probably confuse things further.