If you know your norse legend, Loki can change his appearance and gender whenever he wants. He even turned into a female horse and got impregnated by a stallion and gave birth to a 8-legged horse, which his dad, Odin, is now riding. Remember, he's a shapeshifter. Shapeshifters can be whatever they want.
He didn't want to get impregnated but he needed to lure this stallion from his owner so the owner would lose this challenge he made with the gods so he can marry a goddess. The goddess didn't want to marry this mortal so she asked Loki to mess with the challenge. Loki thought it was a good idea to woo the stallion but accidentally got jumped instead. Not one of his brightest ideas unfortunately.
TODAY WE CELEBRATE!! FATHER AND DAUGHTER HAS FINALLY REUNITED AT LAST!!!
Get the drinks, celebration songs, and food! It's a party!!!!!!!!! ヾ(❀╹◡╹)ノ~ ┗( T﹏T )┛
Kanpai!