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No. Apparently, this is another one of those crazy things created to frighten those who are taking the first steps in their sexual lives. “I’ve never heard of this type of problem and I’ve never seen references in medical books. The vagina does not have any type of hook or coupling that can hold the penis”, says gynecologist and sex therapist Junia Dias Lima. In addition, the human penis is unable to swell during intercourse like that of some animals – dogs, mainly – and thus get stuck inside the vagina. What can happen is a contraction of the perineal muscles (the perineum is the region that goes from the vagina to the anus), blocking penetration of the penis. It is called vaginismus, which most often affects virgin girls or those who have little sexual experience. But this block never happens in the middle of sex. Usually this disorder is generated by some emotional problem: insecurity, guilt or even some trauma (generated, for example, by pain in a previous sex). “When this happens, a disinhibition treatment is needed to increase self-control and knowledge. In addition to psychological follow-up, exercises can be performed, such as inserting a finger and a prosthesis in the vagina”, says gynecologist Carolina Carvalho, from Unifesp.