The song Jakob (Mikael Persbrant) is singing in the shower is "Sommartider by the Swedish band Gyllene Tider.
The song, 'Let's Talk About Sex' by Salt-N-Pepa that Jean starts singing is a song about safe sex. A variant of this song, 'Let's Talk About AIDS' was released to address the spread of HIV and AIDS, which is fitting since Jean came to Moordale after a supposed outbreak of chlamydia.