Swinging, sharing, swapping (UK)

[Handiwerker]

What is the one element within these experiences which turns you on the most
This is just an idea to discover the different parts of these situations which tweeks our horny button the most.

I had many experiences when an ex (Amy) and I started with swinging then sharing and swapping and thence watching from a distance .
From England, we were both 22 when we met and together for around 30 months. Starting about 6 months into the relationship after sex talk led us to realise that having sex with others nearby or just watching them was a positive turn on.
I could go into lots of details about the horny times we had over about 2 years of this sexually heightened lifestyle ( and may be persuaded when I have more time)….but for now the elements which really got to me were…

Watching another lad remove my ex’s clothing and her innocently assisting him without any embarrassment or fuss.
While in the middle of sex with Amy (missionary/sideways doggy) , her starting to stroke another lads cock and then to start passionately kissing him.
Having dinner with our group of swappers and noticing her favourite boy next to her casually stroking her thighs above her hold ups and her wriggling about , handing me her panties with a wink to allow him more access!

So over to everyone else who has experienced all or any of such fun sharing times,…