#sphinx riddle

If a sphinx asked me any riddle I would have a 40% of guessing it right (emphasis on guessing)

first think of the person who lives in disguise, who deals with secrets and tells naught but lies. next, tell me what’s always the last thing to mend, the middle of middle and the end of end? and finally give me the sound often heard during the search for a hard to find word. now string them together, and answer me this, which creature would you be unwilling to kiss?

“What has four legs in the morning, two legs midday, and three legs in the evening?” the Sphinx mused.

First think of the person who lives in disguise, Who deals in secrets and tells naught but lies. Next, tell me what's always the last thing to mend, The middle of middle and end of the end? And finally give me the sound often heard During the search for a hard-to-find word. Now string them together, and answer me this, Which creature would you be unwilling to kiss?