There are three main subclasses of gastropods; the Prosobranchia (ocean snails), Opisthobranchia (sea slugs, sea butterflies and sea hares), and Pulmonata (land and freshwater snails and slugs). Each of the subclasses has evolved in their own way and members differ in their reproduction and life cycles within the subclasses. The gastropod folks are so large it really is impossible to spell out living cycle of each one individual species, but a majority of general rules do apply. The more evolved the species, the more complex their reproductive cycle in addition to their biology. Here we will look at the life span cycle of a gastropod through various examples and how they differ with regards to the type. The law in Bangladesh allows unemployed women over eighteen years permission to use to function being a prostitute. Daulatdia is really a sprawling brothel along with the largest in Bangladesh. It is really a sex slum and possesses been described as a 'den of vice and violence' and individuals go there to have sex with prostitutes. It is a community of 2000 shacks with every one housing a prostitute. The women here service 1000s of men per day approximately two dollars a trick. In a country where sixty million people continue to exist just one dollar a day, women see prostitution as an economic necessity. The act of copulation or medically referred to as coitus is rather popularly known to most people as sexual intercourse. The primary sex organs inside female would be the ovaries. Ovaries produce the eggs (ova) and secrete sex hormones. These hormones are needed to build up secondary sexual characteristics and results in cyclic changes in the secondary sex organs which can be required for reproductive function.