An erection is a vascular process where the corpora cavernosa fill with blood, increasing in length and thickness, often initiated by the parasympathetic nervous system.
Maple trees should be at least 30+ years old before they are tapped and a 40-year-old sugar maple tree will produce about 10 gallons of sap per season.
The classic French maid uniform we all recognize today (black dress, white apron, lace, short skirt) wasn’t actually standard workwear. It was popularized by theater, burlesque, and later porn, because it exaggerated femininity and submissive aesthetic
Selective mutism is a real thing. It's an involuntary anxious response, meaning most of the times the person WANTS to speak but cant! In relaxed situations they can even be super chatty!