Both are red flags. Beyond cultural norms, age difference is asymmetrically applied because of biological differences between male and female reproductive potentials. Even with extreme age differences of 40+ years, the younger female can still have children with the older male, with *minimally* increased risk of birth defects resulting from his age. Even though they do not plan to have children together, the age difference will most likely prevent them from changing their minds in the future. This is why this is a red flag. Of course, as many others have said, no one can tell how significant this issue will be in the ultimate decision-making by the officer.