Why would a guy say 'ouch' when a girl says this?

LollyPopsicle
A guy and a girl spend most days together and he'll go with her when she goes shopping even though it's exhausting.

They've got a best friend kind of connection and he always goes out of his way to do nice things for her.

They visit a chocolate factory together.

When the girl sees a huge chocolate-brown bunny larger than human size, her eyes widen and she says, "That's my future husband right there."

The guy says "ouch" - why?

Is it just a male ego thing or something?
Why would a guy say 'ouch' when a girl says this?
2 Opinion