OK, so it is Islamic law rather than halacha, but a very creative and amusing fatwa, or religious edict.
Ezzat Attiya had issued a fatwa, or religious edict, saying adult men could breast-feed from female work colleagues as a way to avoid breaking Islamic rules that forbid men and women from being alone together.
In Islamic tradition, breast-feeding establishes a degree of maternal relation, even if a woman nurses a child who is not biologically hers. It means the child could not marry the nursing woman's biological children.
He has been disciplined for this, alas.
The rough halachic parallel is as follows: Yichud, or men and women being alone together is forbidden. This is not true for family members. Therefore, transform the man and woman into family members.
It is not clear to me whether he meant this as a joke, or whether he held that the man must nurse directly from the breast (which besides being improper, could increase problems which prompted the geder of yichud) , or could drink from a bottle containing the milk. You must admit it is a creative solution for coping with religious law in the reality of the workplace.
Update: The source:
Chapter 28: SUCKLING OF A YOUNG (BOY)
Book 008, Number 3424:
' A'isha (Allah be pleased with her) reported that Sahla bint Suhail came to Allah's Apostle (may peace be eupon him) and said: Messengerof Allah, I see on the face of Abu Hudhaifa (signs of disgust) on entering of Salim (who is an ally) into (our house), whereupon Allah's Apostle (may peace be upon him) said: Suckle him. She said: How can I suckle him as he is a grown-up man? Allah's Messenger (may peace be upon him) smiled and said: I already know that he is a young man 'Amr has made this addition in his narration that he participated in the Battle of Badr and in the narration of Ibn 'Umar (the words are): Allah's Messenger (may peace be upon him) laughed.
Book 008, Number 3426:
Ibn Abu Mulaika reported that al-Qasim b. Muhammad b. Abu Bakr had narrated to him that 'A'isha (Allah be pleased with her) reported that Sahla bint Suhail b. 'Amr came to Allah's Apostle (may peace be upon him) and said: Messenger of Allah, Salim (the freed slave of Abu Hudhaifa) is living with us in our house, and he has attained (puberty) as men attain it and has acquired knowledge (of the sex problems) as men acquire, whereupon he said: Suckle him so that he may become unlawful (in regard to marriage) for you He (Ibn Abu Mulaika) said: I refrained from (narrating this hadith) for a year or so on account of fear. I then met al-Qasim and said to him: You narrated to me a hadith which I did not narrate (to anyone) afterwards. He said: What is that? I informed him, whereupon he said: Narrate it on my authority that 'A'isha (Allah be pleased with her) had narrated that to me.
Book 008, Number 3428:
Zainab daughter of Abu Salama reported: I heard Umm Salama, the wife of Allah's Apostle (may peace be upon himy, saying to 'A'isha: By Allah, I do not like to be seen by a young boy who has passed the period of fosterage, whereupon she ('A'isha) said: Why is it so? Sahla daughter of Suhail came to Allah's Messenger (may peace be upon him) and said: Allah's Messenger, I swear by Allah that I see in the face of Abu Hudhaifa (the signs of disgust) on account of entering of Salim (in the house), whereupon Allah's Messenger (may peace be upon him) said: Suckle him. She (Sahla bint Suhail) said: He has a heard. But he (again) said: Suckle him, and it would remove what is there (expression of disgust) on the face of Abu Hudhaifa. She said: (I did that) and, by Allah, I did not see (any sign of disgust) on the face of Abu Hadhaifa.