Unadulterously

[…] seeing many beasts in voluntary and chosen couples, live together as unadulterously, and are as truly married in that respect.

One would have to be very unworldly to believe that most men of this kind live ascetically and unadulterously.

And a big reason we were able to come together with such decisiveness is we were both emphatically, unadulteratedly, unadulterously single.