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The answer to this question lies in the natural and social roles of males and females and in the way that sex toys might change the part of men in these relationships.

Simplifying the subject considerably, development has led to most species having males and females for sexual reproduction causing the diversity and sharing of the pool. However the existence of two 'types' of the species has also helped the development of specialisations/roles for your males and females.

In mammals the main biological big difference is that the man provides the female and sperm provides eggs. After fertilisation the female has the role of giving milk for the offspring after birth and seeking after the embryo in the uterus (womb).

With this simple view the male offers just the sperm and a of the gene pool. However it would usually be very costly in resources (in evolutionary terms) for that to become the only real position of males, and therefore social duties have changed. Men usually care for their partner and offspring by helping provide food, safety and a 'home.'

With individuals, changes in much of the world mean that a number of these social functions can be provided by women alone and some women argue the world will be better off without men. In addition biological advances could make men unnecessary because of their biological function of fertilisation of the eggs.

The final remaining need for men may become one of providing entertainment and sexual pleasure for women - but perhaps women could do without men for sex!

There's an increasing move towards women looking at other women for sexual relationships; women are utilizing sex toys more often as penis substitutes and many women discover they get greater sexual satisfaction from sex toys (as measured by power, consistency and stability of climax) than they do from sex with men. For alternative ways to look at this, you might need to gander at: human resources manager.

Some women work out the male role by using a strap-on harness and several dildos represent a man's penis. On the other hand many women would rather exclude the male phallic picture from their sexual play and they pick a vibrator or dildo that's perhaps not phallic and may indeed possess a distinctly feminine style as does the Natural Contours Ultime vibrator.

This simple picture, although perhaps frightening for m