We know that opposite charges repel each other
Same in the case of real life that opposite gender always repel each other and attract each other
According to the searches from America that one guy has been kept with one girl for a year they feel very happy but in the case of boys if boys to boys are kept in house for one month they always feel distract and thus they were unhappy the reason behind the scientist was the answer that opposite gender always attract each other.
This is a science behind this that's why in colleges schools and offices we always attract towards girls and girls always attract towards Boys Over we smart or naughty .
Thanks from Ankit kholiya AK