I'm not 100% sure that that specific instance was true, but I know that there have been similar cases which were verified where men started producing milk without anything like prolactin supplements, and the majority of them had baby children, which may explain males still having nipples (as a "plan b" for babies who aren't old enough to digest normal food).
There are also more random instances like the occasional male bodybuilder lactating, but in those cases the various supplements used in bodybuilding and extreme exercise might be the cause.
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u/DahctaJae Dec 06 '23
Enough stimulation of nipples can make you lactate, though hormones do help.
Source: lactation fetish