Well, I'm a very new Tamagotchi owner. A week ago, I had my first tamagotchi and I had a second one yesterday. I connected them together in "present" mode without wrapping any gift. Firstly, both of them gave a heart-filled present, another one gave a pot of flower. (It wasn't happen in the same connection as you all know.)..However, when I connected them again, the elder one- Tsunotchi- gave her friend, an empty box, a box full of shi-...uhh..I mean poop, then a snake!!!!....The new-kid-gotchi was very furious.... 
Will these affect her mood when she grows up?
