Everyone should try it at least once.
I’m sure it’s one of those kinks that a) more people are in to than might be obvious and b) most people would enjoy if they did try it.
It can be whatever you want it to be, and our sploshing has ranged from very sensual massage-like foreplay, slowly smearing honey or similar on one another, to full-on Tiswas “trashing” with literally buckets of custard getting emptied.
Like any kink, don’t overdo it first. Start small and go from there. Despite popular opinion, AVOID the classic “squirty cream” as it’s actually quite hard to fully wash off the smell and after a couple of days you’ll stink of sour milk. Custard, honey, syrup, blancmange, trifle and so on are all great though. Custard especially as it washes away really easily. We’ve also used baked beans which is undeniably a bit icky but a totally different splosh sensation as they have a certain “heaviness” and texture to them.
Something else to consider is where you’ll get messy and it’s really a choice between using a LOT of plastic dust sheets or having somewhere intended as a “wet” environment like a full wet room, or even outdoors if you’ve got enough privacy. We usually use a large, inflatable kids pool which we can just about fit in the kitchen. A bathtub is ok but very restrictive.
It’s inevitable that there will be some spillage, or spontaneity (see above about “trifling” OH as soon as she got in) and it’s just a case of accepting it’ll happen and clean up accordingly.
And before you even crack open your first carton of custard, have a plan for the clean-up. It needs plenty of shower gel and loads of hot water, plus loads and loads of cloths, wipes and bin bags for the “crime scene”. Some people on the Splosh scene use wet vacs. Never tried, can’t comment. Most goo can be diluted with water and flushed or rinsed down the drain. Anything slightly solid (cake, pies etc) needs bagging and binning. One particular thing to note is that long hair takes LOADS of washing to get even simple goo out. (Oh and be a bit careful about where any goo can go. Wash everywhere really well afterwards…more of an issue for the ladies, if you get my drift?)
As for what you actually do, it’s entirely up to you. Sploshing can be as simple as dripping a spoon of honey on each other’s erogenous zones, or pelting each other with pies as a forfeit during Truth or Dare type games, or emptying buckets of custard over one another for the sheer bloody stupid silly daft ridiculousness of it.
For us, the turn on isn’t just the physical sensation or the tactile feeling. It’s as much about doing something fun and silly together.
Enjoy.