penis
Penile ring (Cock...
Self-sucking (or autofellatio) refers to a man performing oral sex on his own penis, a special form of masturbation. This is the legendary...
Male felines (especially domestic cats) have penile spines or barbs on their penises.
The basal baculum (or os penis) of primates exhibits high variability throughout evolutionary history, making it a key area for studying sexual selection...
Most primates (including monkeys, apes, etc.) possess a baculum (also known as an os...)
The woman-on-top position (also known as the reverse cowgirl position), where the woman aggressively thrusts up and down, is one of the high-risk positions for penile tunica albuginea rupture (commonly known as penile fracture), often listed as the "most dangerous" or "most prone to fracture" position. Many people hear a "snap," and their penis instantly goes limp and swells into a purplish-black eggplant shape. What is a "penile fracture"? Why is it so painful even when it's not a real fracture? Why does the woman-on-top position...
"Ice and Fire After-Sex Flute" is one of the most expensive and representative "final techniques" in high-end sex establishments (brothels, top-tier KTVs, private clubs, and royal bathhouses) in contemporary Hong Kong, Macau, Taiwan, and first-tier cities in mainland China. Why does the glans penis become an "ultra-sensitive minefield" 0-8 minutes after ejaculation? The true lethal mechanism of Ice and Fire (step-by-step breakdown). Why is doing Ice and Fire "after-sex" 10 times more pleasurable than "before-sex"...