Frictions are one of the functional actions
male genital muscles. There are the following points of view on
the relevance of frictions, what is needed frictions:
1. To prepare and activate a reflex mechanism of ejaculation.
2. For the preparation and implementation of the female orgasm, sexual satiety in the first place.
3. To achieve simultaneous orgasm of partners.
4. For workout men muscles. Sexological literature timidly says that the dimensions do not matter, vagina adapts to any size. However, an entire generation in matters of sex education receive the information of erotic, pornographic literature, TV and video, folk humor and folklore. All these sources, before and after the Marquis de Sade, in the main story for coitus use huge dildos and a narrow vagina.