First, surgeon 1 operates with glove A inside glove B.
Second, take glove A out of glove B.
Third, surgeon 2 operates using glove B.
Fourth, turn glove A inside out.
Fifth, surgeon 3 operates with glove A inside glove B.
Note: Another way to ask this is how do you have safe sex with three men, one woman, and two condoms?
Michael Shackleford, A.S.A.