I think they are using the term "attraction" explicitly as a force to draw them together. If they fell apart, it was due to a lack of attraction.It isn't so much attention from an "unattractive" person can cause attraction - this appears to be very rare, but you are sure to not be attracted to anybody that you give no attention. Best bet is to first change your attractivity to your target (may or may not be possible) and then change the attention.