Naturally. I adore Raskvel, they're so cute!
I get what you mean, I've mentioned this myself once or twice (or more) in here. But even so, a more alien mindset/civilization would already be a good start in that direction. A second taur race (like Oddworld's Steefs, for instance) or something weird like Oktigi or just plain and simple fantasy monster girls in space (scorpi-taurs for instance), there's a lot of wiggle room without having to go all H.R. Geiger~
"Scorpi-Taur" fair enough seems alien enuf to me.
Why not in a later update, add a race of creatures so alien that we can't sex them.
It stands to reason that at some point we would find a race like that anyways...
It may be counterintuitive to the type of game that we have, but also, why would every alien species thus far be able to copulate with other races.. not every aliens genitals should be debatably functional with another aliens.
A great example of something like such an alien race would be like.. the novakid from Starbound.