A Canadian teacher who made international headlines for wearing gigantic prosthetic breasts rarely wears them outside of school — raising questions about whether the vulgar costume is just an act. While parents have raged about transgender teacher Kayla Lemieux being allowed to wear Z-cup prosthetics in front of students, the shop teacher was spotted ditching the controversial fetishistic fashion after work and stepping out in public dressed as a man. “He wears prosthetic breasts extremely infrequently,” a resident of Lemieux’s apartment complex told The Post. “He puts the breasts on to teach, occasionally when he goes for a walk or...