This is what happens when I bring up unicorns at my gaming group.
One person in the Group owns a corgi, who is remarkably tolerant of being dressed up in ridiculous costumes. So he was a unicorn for Halloween.
Then we discussed dressing him as a Sir (he's a very gentlemanly corgi), which led to a debate on how a unicorn would wear a hat.
This led to a discussion about the differences of concepts of unicorns between the ancient myths and children's toy manufacturers.
...and then one member brought up the whole phallic symbolism thing.
At that point the GM decided we should get back to the plot, and tried to get us to go somewhere riding unicorns, only to find that nobody took the Ride skill. So he decided on a giant dirigible unicorn, which we decided must be powered by flatulence, which is how rainbows are made.
Then the Barbarian tried to kill it for the XP, and the GM killed him with it, and nearly did the rest of the party in on accident.
Farticorn is a scary Mother F*cker.