Riddle story -Why I can’t “ask”?

Jack is both intelligent and handsome, and he is a student in our elementary online Chinese class. He is one of the best students among his peers；has only then learn Chinese online with us for three months, and could speak few Chinese words, phrases and/or sentences.
One day, he went shopping in China Town and was lost. He saw a young Asian girl walking by, he said ‘hello!” in Chinese to her. The girl responded: “hello!” in Chinese as well. Jack wanted to practice his Chinese and continued speaking Chinese to her “Could I ask you…” Before he could finish his sentence, the girl’s face turned red, left in a hurry and talking back to him as she passed him, “no, no, you cannot, it is not right….”
Jack was puzzled and thought：Why can’t I ask her for the direction?
Dear friends, could you explain to Jack what happened here?

Answer: Jake spoke in the third tone in Chinese “wen” became “kiss”, and “ask” is in fourth tone. He said to the girl “Could I kiss you?”, instead of “could I ask you?” in Chinese.

谜语故事
我怎么就不能“问”呢？
杰克既聪明又英俊，在我们中文初级班，他的学习成绩名列前茅；
才学了三个来月，就能结结巴巴地跟中国人交谈了。
一天，他到市中心的步行街去买东西，走着走着，就迷了路。这时对面走过来一位年青姑娘，他急忙上前问路。杰克先打招呼：“您好！”那个姑娘也回应说：“您好！”杰克很有礼貌地问：“我能不能问您一下儿？”没想到，那位姑娘一下子脸涨得通红，急忙说：“不行，不行！这不合我们中国人的习俗！”说完，她就慌慌张张地跑开了。
杰克迷惑不解地想：我怎么就不能问她一下呢？
亲爱的朋友，你能解答杰克的疑问吗？

谜底：杰克把第四声的“问”说成第三声的“吻”了。