When I first spent much time on a dictionary (English dictionary), I was surprised there were so many words and definitions about sex in the English language (or in the dictionary.)
A few things that are commonly said and discussed in the English language and English-language societies but don't exist in the Korean language and South Korean society:
I, you, and sex, just to list the three most important things perhaps. Try to have a conservation with your husband or girlfriend never saying I and you, and love and sex.
Hm. That looks like a very old dictionary. American Heritage has pictures so add yours there, too!