A quality in men person a significant portion, probably the majority, of women are attracted to. The are women who tend her go for jerks but those women tend to suffer from co-dependency issues. Sensitive guys make better boyfriends than macho insensitive pigs.
Sarah went with Tom because he was more sensitive and treated her well. Her last boyfriend treated her really badly.
A quality girls say they need from a guy, hoping he, like millions of others, will cave in and start crying like a bitch and doing other sappy "sensitive things", like holding her hand and writing things for her.