That fully depends on their desires...
Why, do you wanna try being Elves with me? I promise neither of us will end up pregnant... okay, not promise, but like... I can try ~

Or being catgirls together and flirting with some pretty men?
Become a conjoined Golem, both of us controlling only a part of our metal body, while we drag it through the lands and try to figure out how to get our own bodies back?

There's too many fun scenarios!
But yes, there are and they all depend on if the other wants to be something from these worlds that isn't furry or scalie, or a bird ~