social cues
Those important things one doesn't pick up on, which often involve or suggest willingness to engage in a relationship. Failure to pick up on social cues tends to result in missed opportunities, not limited to having a girlfriend or boyfriend and rounding the bases. Social cues are the original source of heart ache since the beginning of time.
Jeff: Hey did you notice the way Jane Doe was looking at you? She wants you to ask her out.
Joe Shmoe: Naw, bro. I'm clueless at picking up on social cues. That info would have been helpful about 3 months ago.
Joe Shmoe: Naw, bro. I'm clueless at picking up on social cues. That info would have been helpful about 3 months ago.