Jrock is the short version for "Japanese rock", which includes Visual Kei, normal and alternative rock, but from Japanese bands. The term sometimes includes Japanese metal bands (such as Maximum the Hormone), but it's more rarely seen.
The most popular Jrock band in Japan is SID, but the GazettE has a lot of fans outside the country. They play Visual Kei and DOES plays normal rock in Japanese.
The act of fornication, in the missionary position, upon a hay bale. To perform this maneuver properly make sure that the scrotum impacts the side of the bale on the inward thrust *Caution* This sexual act can cause brush burn to the scrotum. If done improperly the recipient will need to have his testes rubbed with lotion by the local fire department.