This chapter was terribly beautiful and painful, really good for a side note. [I was kinda angry it was so short, then I saw 65.5 and remembered there's 66, so much win]
Guys all the talking on Rimuru this and that, he has a genderless woman inclined form and consequently a feminine voice, the same happens to men deprived from testosterone, the base form of the body's usually more feminine in nature or rather makes us reminisce of it. [Hate the voice in the anime though, not adequate at all. At least use different voices for each form -.-]