An excellent infographic about how Western research skews results, from Best Psychology Degrees:
Source: Best Psychology Degrees
Yes, but the intended audience is from the developed West as well. I don’t think many try to juxtapose a study on dating habits of college students to 19 year olds in a Sudanese village.
That said, one always has to look at the methodology and survey parameters of any study. Lots which get headlines nowadays are actually utter garbage.
But to reduce this bias to “culture” also reveal some problematic biases. A report a few years ago better pointed out that this group is also fairly rich and educated (among other things).