It's just like Demolition Man.
Spartan: All right Huxley, let's do it the old-fashioned way.
Huxley: [cringes] Disgusting! You mean... fluid transfer?
Spartan: No, I mean boning, the wild mambo, the hunka chunka...
Huxley: That is no longer done. Do you know what the exchange of bodily fluids leads to?
Spartan: Yeah I do. Kids, smoking, a desire to raid the fridge.
Huxley: Rampant exchange of bodily fluids was a major cause of society's downfall. After AlDS, there was NRS, then there was UBT. One of the first things Dr. Cocteau did was to outlaw and engineer all fluid transfer out of socially acceptable behavior. Not even a mouth transfer's condoned.
Spartan: Kissing's not allowed? [Lenina shudders at the thought] Damn, I was a good kisser.