S-line Anal Sex: The S-line crease and fine lines represent the top choice in anal-masturbation design, providing enhanced tightening. Olivia is the best-selling product due to its ideal size for insertion. Size: 26 cm x 18 cm x 13 cm. INTERNAL STRUCTURE G-spot: A stimulating structure designed to enhance pleasure within the aroused vagina. The narrower end of the design delivers greater satisfaction from deep within. Re-tightening: Experience five times the real anal tightening compared to vaginal contraction in the later tightening phase. The penis and head will experience heightened excitement.