In an act 'so heinous, it defies the imagination,' famed awards-show joke writer and Hollywood Squares regular Bruce Vilanch was sodomized by an unnamed homosexual Monday. Authorities are still at a loss as to what could have motivated the homosexualwhom Vilanch met at a dinner party before accompanying him hometo commit the act. 'How could anyone do such a thing?' asked Vilanch's distraught Hollywood Squares co-star Whoopi Goldberg. 'What sort of inhuman monster could bring himself to do this?' Vilanch, who described himself as 'perfectly fabulous' following the incident, told reporters: 'I felt like Monica Lewinsky... at a cigar store! 