A City Guide To Guiyang for Parental permission will of course be required in order for the vaccination to be given. The use of condoms Prior to HIV and AIDS, sexual behaviour was generally considered to be private’ behaviour and somewhat under-researched with the exception of clinical studies of individuals experiencing sexual difficulties. The lack of information as to the sexual practices of the general population made it initially extremely difficult to assess the potential for the spread of HIV infection. One notable survey that was triggered by this need for information was the N ational Survey of Sexual Attitudes and L ifestyles, conducted with nearly , adults aged ? living in Britain in ? Wellings et al Figure presents data relating to the percentages of men and women across four age groups who had used condoms during sexual intercourse. It was found that n Young people use condoms more commonly than older people. n Females tend to use condoms less often than males. Figure Condom use by age and gender in the N ational Survey of Sexual Attitudes and Lifestyles. A City Guide To Guiyang 2016.