A certain man
From A Wiki of Ice and Fire
The making of Varys the eunuch
When Varys was an orphan boy he was apprenticed to a travelling folly. The folly’s master owned a fat little cog and they sailed up and down the narrow sea performing in all the Free Cities and from time to time in Oldtown and King’s Landing.
One day at Myr, a certain man came to the folly. After the performance, he made an offer for young Varys that his master found too tempting to refuse. Varys was in terror. He feared the man meant to use him as he had heard men used small boys, but in truth the only part of Varys the man had need of was his manhood.
With the ritual complete, the man had no further use for Varys and tossed him out on the streets. Varys asked the man what he should do, to which the sorcerer replied he supposed that he should die. Varys to spite him vowed to live.