The German antkeepers call trophallaxis (which sounds like a medical procedure) the much cuter "schwesternkuss" and I think we should steal this word into English-speaking antkeeping because it's better.
(I don't know what German scientific articles say, maybe not "sister kissing")
UPDATE: I have been informed that sadly this may just be one weird dude I know who says this and not a cool new trend word in German antkeeping.