MY thoughts (this will not be popular, and so take with a pinch of sugar to make more palatable): I do not enjoy soft swing.
Here's why:
I've been a swinger for best part of 15 years, and while I've seen and been involved in a fair few things, but do admit I have NOT done it all so my journey of growht still continues. However I have been opportune to various experiences to learn what I like and dislike.
I am aware when it comes to sex, the female body can be your worst sudoku puzzle come to life: it takes meticulous study, strategy, and a little bit of tinkering. And just when you think you've got it, a different puzzle of a lady comes along, and the process needs ot be restarted (in short, what works for one doesn't work for all).
As such, I have found there are numerous ways to please a lady with and without penetration: a surprising number of women simply do not need or seek to get to "the ultimate", and would have a lot of men believe they have partners (or B.O.B) for that: we are simply there to fill in the blanks and those hard ot reach places B.O.B cannot reach.
But with us guys, the dynamics are flipped. Without some researched and possibly explorative kink (there are a few!) not many men can achieve the same heights of orgasm that an ejaculation lends itself to. Its just how were built. Ladies can happily orgasm without ejaculation of days,weeks,... you get the picture. But you tell the average guy to be happy WITH sexual experiences for the next 6 months and not ejaculate at any point, and he will wonder if its April Fools day.
So, for me, I have been invited over the years to some "soft swing" meets, where the lady or couple in question are happy to get together for some steamy fun. But when it comes to penetration, that's where I encounter the ultimate deflector shield, with the eternal words of a greying Gandalf "You shall not pass!",.. so I go to bed, to listen to said lady finish herself off, while I am laid just yards form her to finish myself off with my hands. The frustration is unreal!
Eventually, I came to admit that soft swing is NOT for me: it left me more pain and disappointment, and I hard to try really hard to ensure it wasn't some dark thought in my head leading me to think the other party had just taken the piss out of me, used me for theirpleasure with no promise of anything in return. But such is my lot as a guy I reckon.
So, learned in that arena I am one of two things: a sexual deviant when let loose with a willing volunteer, or a happy social swinger. The middle ground is where I drown.