Learning English, the sweet and the... embarrassing

While decorating the living room with toy jewelry for A Dream Come True (mine,apparently):

Lily: "Lukasz, these silver beads give me an idea..."

Lukasz: "Mmm... This ring -tsk- it gives me an idea."

A few moments later...

Lukasz: "Mommy, I can't do this [he drops his voice, lowers his face and peeks up at me]... sh*t."