Very simple, because the success rate is high, why is it high? Because for junior students, senior students think that they know more and are more mature than their peers or elementary school brothers in many aspects, and they can also provide some help to make them feel better at ordinary times, but if they are for their peers or seniors, it will be invalid. After all, my contemporaries or seniors know more and will not be moved by these little routines. The most important thing is that there is no senior from the beginning, so look at your behavior with admiration and your success rate is low. For a junior, it is easy to be moved by the routine of a senior. Since the pursuit of success rate is high, of course, more and more seniors choose to pursue junior girls. Who doesn't want their pursuit to succeed? If it were you, you would choose the one with high success rate.

There is another very important reason. In some science and engineering schools, there are often more boys than girls. The serious imbalance between men and women has led more and more boys to look at their sisters. I hope I can find my own love in a simple, simple-minded and innocent girl.

There are still some differences between boys and girls. Especially in some concepts, many girls of the same age are much more mature than boys, which is true, but it is really mature. So many couples will think that boys are naive. Very irresponsible, which is probably caused by this reason. So it is really suitable to find a junior as a girlfriend.

To sum up, we can see why so many boys choose to follow their sisters, and why there are sentences like "fire prevention, theft prevention and elder brother prevention". So everyone knows, but it's not bad to find a senior older than yourself as a boyfriend. At least I can give you more mature love.