Something older folks often say to try to get to know you, or to keep a conversation going when there is nothing left to say. This will usually happen during every conversation, and is commonly used on people ages 15-22.
Older Gentleman: "So that's all I really needed to talk to you about..."
Young Man: "Alright, sounds good. I'll give you a call next week."
Something to say when you see a gorgeous woman pushing a baby stroller or carrying a child. It's considered a subtle way of pointing out a hottie in the vicinity.
Opposite of I can't see how that happened.
First example:
Guy #1: Look at that MILF over there!
Guy #2: I can see how that happened.
Second example:
Guy #1: Blah blah blah blah blah.
Guy #2: (nods in a direction) I can see how that happened.
Guy #1: Oh yeah, totally.