A step up from taming familiar creatures, it only required boldly coming where no woman has gone before!
Of course, besides boldness, proper techniques are required, mainly to convince the xeno you're not food: certain ways of touching, sounds, movement, smell, treats, appearance. Yes, sometimes it even involves funny hats. But once you got it down, Cap'n, I assure you it's more than worth it! Yay for Xenophilia!