The amount of Tequila consumed in bottles (fifths)that would be required to do (screw) a chick or guy. "Eating the worm" adds additional caveats to the meaning without drinking an additional bottle. The tequila factor can be stated with or without "eating the worm". The tequila factor limit is three (3)bottles including eating the worm, because tequila will make you fall in love with anything.
Gosh, she/he, has a one bottle tequila factor without the worm, before I would do her/him!
Her?, she has no tequila factor!
That's definitely a three bottle tequila factor, including the worms!