Using hiragana implies he doesn't understand the word -- is that actually a thing?
Rather than using the kanji for the word, he's just repeating back the sound- implicitly, he doesn't actually know what it means.
This is what a girl's place is like...Yes. The genitals are also modeled. Should Takeru-sama desire it, sexual intercourse is also available as part of the owner's mental care function.Sexual... intercourse?
Using hiragana implies he doesn't understand the wordSex.Se...sex...*ba-dump ba-dump❤**haah*❤*twitch*❤*twitch*❤*slap!**haah*❤*slap!*Ah! C-cumming!!!*slap!**slap!**creak*Is... is this really OK??Yes. Assault-dolls are completely obedient to their owner's orders. Please give the order should you require mental care at any time.*spuuuuuurt!!!*...Thank you for your hard work.