Certainly one of the weirder search strings that have led people to my doorstep:

VISITOR ANALYSIS
Referring Link: http://www.google.ca/search?q=sound of cats having sex&btnG=Search&hl=en&sa=2
Host Name: 52.141.hiper0-nic0.std.dialup.ncf.ca
IP Address: 134.117.141.52 [Label IP Address]
Country:
Region:
City:
ISP:

VISITOR SYSTEM SPECS
Browser: Firefox 2.0.0
Operating System: Windows 98
Resolution: 1024×768
Javascript: Enabled

The sound of cats having ? I do hope that’s for a grad project rather than some bizarre fetish.