There’s a few thousand years of anecdotal information from several great empires the governmental bureaucracies of which were managed by such geldings. There are even recordings of Castrati opera singers from the early 20th century. The scientists proposing this “research” should themselves volunteer and tell everyone what it feels like.
and Michael Jackson in the late 20th century. What a freak show that was. Experimenting on humans is the domain of mad scientists.