There's a running series in a Esquire magazine called "What it Feels Like", where people describe what some act or experience feels like for the rest of us that either can't or likely won't ever experience it. (examples: "What it feels like to be in an earthquake", "what it feels like to skydive", "what it feels like to be a drug mule", etc.)

So with as wide and diverse of a crowd as we have here, it would be fun to have a running thread of "what it feels like" experiences; preferably sexual, but maybe not exclusively.

Examples to choose from and expound upon, depending on your experiences/points of view:

What it feels like to give/receive a blow job
What it feels like to have anal sex
What it feels like to fuck a well-endowed man
What it feels like to be a well-endowed man
What it feels like to receive a rim job
What it feels like to have tantric sex
What it feels like to be bound and whipped by a master
What it feels like to be a master for the first time
What it feels like to have a threesome (from any perspective, be it MMF, or MFF)
What it feels like to be bisexual
What it feels like to receive/participate in double penetration
What it feels like to use a Lelo
What it feels like to have sex for the first time
What it feels like to deep-throat
What it feels like to have an orgasm
What it feels like to have multiple orgasms
What it feels like to fuck a stranger
What it feels like to receive bukakke
What it feels like to be the object of a gangbang
What it feels like to be a stripper
What it feels like to be an escort
What it feels like to watch another person fuck your spouse/significant-other

And there are countless others, but if people with experience with one of these (or another that you come up with) could take it and give a summary of 'what it feels like', then not only will it be interesting to read what others have experienced, but it might end up being a quick-reference for those needing a dose of realism within their stories.