Natural erections are elicited by the neural signaling of nitric acid, which in turn is triggered by some desire, or thought, or external stimuli.
External stimuli triggers neural signaling of nitric acid, which causes natural erections.
Nitric acid is not involved in eliciting natural erections.
The people are near a building.
It's easy, isn't it?
An older woman is going for a walk.
The woman was a doctor.
The Iberian cave tombs in the nearby hills are referred to as the Covetes de Moros.
Three young women are sitting down to eat at a restaurant.