I've come to observe a tendency of imbalance between supply and demand of affection/attention between men and women.. Like just see how any girl can get hundreds of likes a day on tinder while most guy will be happy having few likes a week. I know this is caused by having way more men on these apps than women, but still, there's a reason it's not proportional with the real population. I know this information is more anecdotal, but it seems that i know a far greater ratio of women who are in couple than men who are or even ever have been and it reinforce that same idea that somehow, somewhere there's something causing this imbalance.