Anal penetration places direct, continuous mechanical pressure against the posterior vaginal wall from an alternative anatomical angle. The movement of the penis inside the rectum creates a heavy rhythmic compression that stimulates the deep G-spot tissue and the surrounding urethral sponge. This intense internal friction accelerates pelvic congestion without requiring direct clitoral contact.
The continuous physical containment triggers reflex contractions in the pelvic floor muscles. This accumulation of tension forces fluid release from the skene's glands, causing a sudden female ejaculation. The sensory focus stays on the dense friction within the rectum, lowering the arousal threshold and leading to a combined climax through constant physical pressure.
