Sex isn't disgusting unless you make it disgusting!
Although humans tend to view sex as mainly a fun recreational activity sometimes resulting in death, in nature it is a far more serious matter.
As Darwin puts it in The Descent of Man, 'Male snakes, though appearing so sluggish, are amorous.' Isn't that just like Darwin? It was one of his main ideas, you know, that the males of almost all animals have stronger passions than the females. Since then we've learned a thing or two. At any rate, the female snake is right there when spring arrives in the woods.
It is precisely because I believe it is not possible to neatly separate the sexual from other sorts of relations that I find the movement to bar the sexual from pedagogy not only dangerous but supremely impractical.
When authorities warn you of the sinfulness of sex, there is an important lesson to be learned. Do not have sex with the authorities.
There is hardly anyone whose sexual life, if it were broadcast, would not fill the world at large.