His parents were oblivious.
It stayed there for a full 12 months–until a passing helicopter noticed it.
The pilots found out the address and then notified the local newspaper. Who then notified his parents. Most of us would be dead and grounded forever.
But the parents were good sports. His son was overseas when they found out. (Source: Teenager’s 60ft painting of penis on parents’ roof spotted in space. Weaver, Matthew)
His father said, “When Rory gets home he will be given a scrubbing brush and white spirit and he can go and scrub it off.”