The eternal struggle of quantum physics students trying to grasp Dirac notation while their professor casually drops the line "transforms a ket state to a bra." First-years frantically looking around wondering if they accidentally enrolled in Quantum Lingerie 101.
The dagger operation (†) in quantum mechanics is actually transforming mathematical objects - turning column vectors (kets) into row vectors (bras). Nothing to do with undergarments, despite what your confused brain might think when half-asleep during morning lectures.
Meanwhile, physicists have been giggling about this terminology since Dirac invented it in the 1930s. Ninety years of the same joke and we still haven't outgrown it.