Thomas Rowlandson's erotic engravings.

Thomas Rowlandson (1756-1827), erotic engravings.

From http://commons.wikimedia.org/wiki/Thomas_Rowlandson_erotic_engravings

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even the Romans did it...

even Romans did it...

as from a fresco in the public baths at Pompeii
https://en.wikipedia.org/wiki/Erotic_art_in_Pompeii_and_Herculaneum

Compare & contrast with what you may have been told.
https://web.archive.org/web/20170415164512/http://lds-mormon.com/worthy_letter1.shtml

...The First Presidency has interpreted oral sex as constituting an unnatural, impure, or unholy practice.  If a person is engaged in a practice which troubles him enough to ask about it, he should discontinue it...

Related blog, which is apparently a parody:
https://stakepresident.blogspot.com/2011/05/oral-abstinence-key-to-happy-fulfilling.html

And a relevant quote from the comments section of linked to blog:

President, I have a very embarrassing yet pertinent question I feel I must raise. As a daughter of Zion, I have always kept myself pure unto the Lord, which has led to some difficulties in the marital bed. My dear husband has discovered the key to unlocking my glorious God-given pleasure center is through his own oral skills. In fact, I cannot achieve a certain high point without such activity. If we follow our Lord's annointed's advice, I fear I shall never achieve sexual satisfaction again. What is more important do you think? Perhaps continue this practice and then repent once we are old and don't care about sex any more? Oh help me President, I am so torn!! 

As for the Pompeii bath house art shown above, I've found that there's apparently other humans with similarly healthy exuberance also.

Fertility festivals found:

https://en.wikipedia.org/wiki/Kanamara_Matsuri

https://en.wikipedia.org/wiki/H%C5%8Dnen_Matsuri

https://www.youtube.com/watch?v=nCIjjvl1JQE


Additional:
https://www.google.com/search?q=fertility+festivals&um=1&ie=UTF-8&hl=en&tbm=isch&source=og&sa=N&tab=wi&biw=1280&bih=839

And on my own older website:
http://corvus.freeshell.org/corvus_corax/two/art.htm#Pompeii