the " Art" of anal dilation for anal preparation
Our anus is the tightest and the most sensitive of all our openings and because of this it feels amazing when penetrated. But also because of this, you must be careful to not cause a painful experience.
Good penetration is prepared by good dilation. Knowing that your anus usually opens up to 1 inch in diameter daily during bowel movements and that the average diameter of a penis is 1.4 inches, an effective anal dilation ranges from at least 1 to 1.4 inches in diameter.