Relatability is certainly a key component of Knocked Up «s
inherent appeal, as it plunders for
humor that most nightmarish of singles» fears, unwanted pregnancy, via the
story of Alison (Katherine Heigl) and Ben (Seth Rogen), a mismatched twosome whose polar - opposite lives are accidentally entwined by a drunken one - night stand that, due to miscommunication over use of a condom (the momentous phrase
in question being «Just do it already!»)