请用英语翻译这个笑话

certainforeignertakepartinapartyinchinese,heheardso 方便。theforeignerwoudringand 方便?othe 方便istoeltconveniencejustmeansgoingtobathroom!”Thentheforeignerrea “takingtheloadoff”.Atthisverymoment,theforeigner’sfriendcametohimfromanothertableandsaid:”Wheneveryou’reconvenient,let’shavedinner!”Theforeignerbecameconfusedoncemoreandasked:“Whywouldyouwanttohavedinnerwith