Mathematicians are often "inventing" stuff that are useless, just for the lulz, and then the stuff gets useful.

tell me what use there is for algebraic topology, other then the lulz.
Good one, focusing on a tiny, easily backed up part of your statement, and ignoring the rest of what both of us said.
yeah man, fuck the rest! should properly stop now, before my drunk brain embarres me anymore.