You can call it ideological bias, but I think it comes down to everything that is related to humans and society, not only sex. Human sexuality implies psycholog

You can call it ideological bias, but I think it comes down to everything that is related to humans and society, not only sex. Human sexuality implies psychology, which is linked to mass psychology and hence society. A study that excludes these factors must be very narrowly restricted to e.g. purly medical issues. This can make sense in such clearly defined domains, but as soon as you broaden things to sexuality in general, you have to take context into account.