Parents are naturally selected to maximize the difference between the benefits and the costs, and parental care will tend to exist when the benefits are substantially greater than the costs. A special case of parental investment is when young do need nourishment and protection, but the genetic parents do not actually contribute in the effort to raise their own offspring. A registered service mark of Elite Marketing Solutions Inc. Clutton-Brock expanded the concept of PI to include costs to any other component of parental fitness. Furthermore, each intercourse could result in a nine-month commitment such as gestation the act of breastfeeding for the woman. The earliest consideration of parental investment is given by Ronald Fisher in his book The Genetical Theory of Natural Selection ,  wherein Fisher argued that parental expenditure on both sexes of offspring should be equal. As menarche is the sign of puberty, females are more likely to engage in sexual activities earlier because of the facilitation of early menarche.
Also, the acts of fertilization and gestation occur in the women, which compared to the male's investment of just one cell outweighs it. Parents are naturally selected to maximize the difference between the benefits and the costs, and parental care will tend to exist when the benefits are substantially greater than the costs. This potential negative effect of parental care was explicitly formalized by Trivers in , who originally defined the term parental investment to mean any investment by the parent in an individual offspring that increases the offspring's chance of surviving and hence reproductive success at the cost of the parent's ability to invest in other offspring. Moreover, although it may seem that mate seeking motivation is no longer a determinant, in modern wars sexuality, such as rape, is undeniably evident in conflicts even to this day. Simply access the site from your phone and get flirting! From Trivers' theory of parental investment several implications follow. When you browse our sex personals, you'll immediately find there are many local fat girls looking for sex in your area. Right"; instead, they are here seeking the man of their night, week, or month The fact that big brains consume more nutrients than smaller brains makes this especially relevant for evolutionary theories of the brain. Thus, what Thornhill and Palmer called an 'evolved machinery' might not be very advantageous. Remember, the women here want to have lots of hook ups, and it's up to you to give them what they want They only want one thing: Women on My Sex Hookups are not here to find their "Mr. Sexual selection naturally took place and men have evolved to address its unique reproductive problems. Just fill out your profile, post a sexy photo and start having sex with like-minded fat girls in your area. Females as the more investing sex[ edit ] Due to the heavy investment that women engage in after conception, evolution has favoured women who are more selective of their partners. In those terms, the female investment greatly exceeds that of male investment as previously mentioned. Then sign up at MySexHookups. Meet local plus size singles with big tits, juicy asses, and big belly fat girls looking for sex. For example, the United States expected to win the Vietnam war due to its greater military capacity when compared to its enemies. If her partner has an emotional attachment to another female it's likely that he won't invest into their offspring as much, thus a greater stress response is shown in this circumstance. It has been argued that jealousy has developed to avert the risk of potential loss of parental investment in offspring. The male psychology conveyed in the ancient past has been passed on to modern times causing men to partly think and behave as they have during ancestral wars. They increase their own reproductive success through feeding the offspring in relation to their own access to the female throughout the mating period, which is generally a good predictor of paternity. Among other adaptations, men's psychology has also developed to directly aid men in such intra-sexual competition. In terms of sex cells egg and sperms cells , the female's investment is a lot larger, while males produce thousands of sperm cells which are supplied at a rate of twelve million per hour. Joining us is free, and you can browse through tons of profiles of hot women wanting sex who are ready to share their bedroom adventures with someone like you.
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