"A pig." Your girlfriend says, blushing furiously.
"Why?"
"I just want to see what it's like." She then thought of what she would look like as a pig. But she wanted the transformation to take place over time and not all at once. She felt a rumbling in her stomach and she farted loudly. Then she farted again, the sound echoing off the walls. A curly pink tail poked it's way out of her panties. Then she snorted and she had a pig's nose.
What's next you wonder to yourself...