True repentance looks like the way you saw the other gender around 12, 13 – 14 years old.
Before that time you probably saw the other side as pretty useless, once you repented, and it sort of just happened, you couldn’t get them off your mind. In essence you had a whole new way of seeing.
That is what Jesus is saying: Repent for the Kingdom of Heaven IS at hand…
(paraphrase from a sermon by Alan Smith)