Does Kissing Break Wudu?
Question

My husband always kisses me when he is going out of the house, even when he is going to pray in the mosque. I sometimes feel that he is kissing me with desire. What is the Shar`i ruling on his wudu?
Praise be to Allah.`Aishah (may Allah be pleased with her) said that the Prophet  (peace and blessings of Allah be upon him) “kissed one of his wives then went out to pray, and he did not do wudu.’” (Abu Dawud, al-Taharah, 180, 179, 178; al-Tirmidhi, al-Taharah, 86; al-Nasai, al-Taharah, 1.104; Ibn Majah, al-Taharah, 502)
This hadith indicates the ruling on whether or not kissing and touching a woman invalidates wudu . The scholars (may Allah have mercy on them) differed concerning that. Some of them said that if you touch a woman , this invalidates wudu in all cases; some said that if you touch a woman with desire, it invalidates wudu, otherwise it does not. Some said that it does not invalidate wudu at all, and this is the correct view.
This means that if a man kisses his wife, or touches her hand or hugs her , but he does not emit anything, then his wudu is not invalidated and it remains as it is. That is because the basic principle is that wudu remains as it was, unless there is proof that it has been broken. 
There is nothing in the Book of Allah or the Sunnah of the Messenger of Allah (peace and blessings of Allah be upon him) to indicate that touching a woman invalidates wudu. On this basis, touching a woman, even with no barrier and even with desire, and kissing her or hugging her, does not invalidate wudu. (Fatawa al-Marah, Ibn ‘Uthaymin, p. 20) 
But if madhiy (prostatic fluid) or maniy (semen) come out of him as a result of kissing her, then his wudu is invalidated in that case.
For more, please see this category: Nullifiers of Wudu
And Allah knows best.