Okay. If you want to mate them, make sure they're BOTH ADULTS and DIFFERENT GENDER. Then use the love potion. You only need to use ONE. There should be two hearts changing colours on top of the tamas' heads. Connect them RIGHT AWAY or else it's going to wear off. After you connect them, they should be shaking their heads and then jump off. The lights will turn off and there'll be fireworks (if the sound is off, there'll be weird shooting off music). The girl tama should then have two baby tamas of the SAME GENDER on her screen. They'll be all three happy and then the girl tama's going to tell ONE of the babies to go over to the boy tama. Please pay extra attention to the words that are written in capital letters.
Hope I helped!