I heard a speaker say this to teenage bochurim-
(You may want to replace the first instance of the word “problem” with “interest”, it’s a softer tone but it doesn’t fit as well.)
“Every male has a problem with females, any male who says otherwise is either lying or has a bigger problem.”
H-shem created this desire in the interest of keeping the population going for generations to come.
My wife was at the speech for teenage girls where the following was said, “There is a difference between being attractive and being attracting. While every girl could and should look attractive, acting in an attracting manner is a serious lack of tznius.”
By the same idea, girls should be fine going for walks and schmoozing with friends. Standing in front of one location for an extended period of time, while socializing and laughing in a loud manner should be discouraged.