You're probably thinking of the Shakers, compared to other non-conformist sects, the Quakers had relatively few hangups about sex.

That being said, I can attest to at least the Shaker melody (well known from Copland's "Appalachian Spring") as a touchstone of American culture. It's pretty good.

Shaker, not Quaker

Also Puritans.

Puritans were actually very pro-sex (within marriage), which was a marked contrast to the pro-celibacy views of Roman Catholicism, and opposite the view of the Shakers.

See, for example, http://www.challies.com/quotes/the-puritans-and-sex which quotes quite a few Puritan writings.

Roman Catholics are pro-celibacy? You mean the priests?

yes, sort of -- I mean that Roman Catholicism includes pro-celibacy views, particularly regarding priests (to go along with pro-marital-sex views; it's not single-sided.)

The point was to show the contrast -- the Puritans were only pro-celibacy for the unmarried, which they viewed as a temporary state; they had a pretty one-sided "everyone should get married and have lots of sex" view. They themselves considered this to be in opposition to RC views. (And, in particular, comments about the Puritans being anti-sex are way off base.)

I thought RCs had the same view?

Also - https://www.youtube.com/watch?v=fUspLVStPbk :-)