yeah, i've never lost a thread over it personally, i've just seen people talk about it on plurk and around here over the years. but i've gotta say that explanation makes a lot of sense to me.

i do agree that cum sounds more penthouse-y. i've always defaulted to using cum in dirtier smut threads and come in more serious or emotional ones, but i've never been drawn out of the moment if someone uses it differently. language is fucking weird man.