A "Lucky" Frog

In the United States, you can call a telephone number and someone will predict your future. This is called the 'psychic hotline'. Well, one day, a little green frog decided to call the psychic hotline and see what his future held for him. The psychic told him, "You will meet a very beautiful girl, who will want to know everything about you." "That's great !" said the frog. "Where will I meet her? At a party? In the pond?" The psychic hesitated, then responded, "You will meet her next semester, in the Biology lab!"

Please tell me why you think this joke is funny?

PS. 現在的生物課, 還有解剖青蛙嗎?