If people think nature is their friend, then they sure don't need an enemy.
Make love when you can. It's good for you.
History! Read it and weep!
Give your readers as much information as possible as soon as possible. To heck with suspense. Readers should have such complete understanding of what is going on, where and why, that they could finish the story themselves, should cockroaches eat the last few pages.
Sons of suicides seldom do well.
After that demonstration everybody was thinking, what's going to happen to these wonderful men who have been so useful to us? We have to give people something to do with life.