Notice the bus name "Archbishop Damiano". Maybe the school is educating those parochial kids on sex.
It reminds me of a story told by a former parish priest, who once was driving a bus full of parish kids and a couple CCD teachers to a youth outing. They were passing a adult entertainment establishment, similar to the one above, when one of the young boys yelled, Hey, Father, there's Mr. _______, the usher at mass. The priest said, "I'll blow the horn. Everybody wave."