Theoretical and empirical basis for protection: Condoms can be expected to provide different levels of protection for various STDs, depending on differences in how the diseases or infections are transmitted. Male condoms may not cover all infected areas or areas that could become infected. Thus, they are likely to provide greater protection against STDs that are transmitted only by genital fluids (STDs such as gonorrhea, chlamydia, trichomoniasis, and HIV infection) than against infections that are transmitted primarily by skin-to-skin contact, which may or may not infect areas covered by a condom (STDs such as genital herpes, human papillomavirus [HPV] infection, syphilis, and chancroid).
In some essays, the writer takes an exploratory approach, perhaps dealing with a variety of proposals and solutions. The conclusion states the thesis almost as if it is a discovery, allowing the reader to make the discovery along with you. However, this can be a difficult technique to carry off. The thesis, even though it may go unstated until the very end, should nevertheless serve as the inevitable controlling force for the entire essay.