A Church dictated how you were supposed to have sex

In Medieval Europe, the Church dictated how you were supposed to have sex.

 Anything other than the common “missionary position,” for example, was considered unnatural and therefore a sin, according to the Church. 

The woman on top position, or entering her from the rear were not favoured because they interfered with the natural order of male-female roles. 

Anal and oral sex were sins because they could only be practiced for pleasure, not procreation, which for the purists was the only purpose of sex.