It depends on who I have been around that day.  I know that often my wife's sister comes to mind though

If it is the first time, I have no problem keeping my mind focused on the sex.

the real deal right in front of you.  If you've got to think about someone else, then go see her instead, and if you've got to think about pron, then save yourself $500 and hour and pop in a DVD.

That said, odd stuff does pop into my mind.  Just two weeks ago I had the solution for a formula in  a model I was working on cross my mind during DATY, and I really should have told her thank you, but she might have taken it as an insult.  It was one of those chain thoughts where one thing leads quickly to another and then boom I had the answer, and two minutes later she came.  Pretty awesome actually.

and trying to focus on every nuance to make it last  a lifetime

so as to delay climaxing before I desire.

thinking how happy I am to be with this Beautiful woman!

Normally right there in the moment but every now and then

An odd thought will come to mind during the throws of a getting it on, lol.  One in particular towards the end of my last relationship i had the hottest image of me mashing my bows face into my Y during daty.  I dont know why i found it so exciting but i creamed & squirted a river. Me and my ex have since parted ways but the thought really made for a really hot ending.  
Go figure he was finally useful for something, lmao

Things that have crossed my mind.....

Please no more teeth, damn that hurts.....
This is the worst acting i've ever seen...lets just get this done with  
I should of just called my ATF
She's way over priced for what i'm getting
This was a waste of money and two hours

"Does this Gimp suit make my ass look fat?"

I hope my husband doesn't come home haha


Samiam

In Oral, I imagine my kinky fantasies lol  

If it is vaginal, with most guys or my clients... I really am focused on him and how good he feels in me...  

 
If it is a man I am dating, and IU have opened up about my naughty fantasies, then usually I am doing a lot of Role play/Dirty Talk  in the arena of my kinky fantasies...So I am thinking about what I am saying and picturing what I am saying...

it means the sex is bad.

It's all about performance: whether she's digging what I'm doing, or whether I'm enjoying what she's doing. I aim that both of us enjoy or at least tolerate what's going on...

...and enjoying the sights and the sounds of our activity. I am an ass man. K9 is my favorite position. While engaged with her in that position I am admiring her marvelous bottom and enjoying the feeling. While getting a bbbj I'm looking at her, admiring her looks, lusting for her body, and enjoying the sensations of what she is doing to me. While DATY (another of my favorite pursuits) I am listening, feeling her response and reacting to her actions. I enjoy how she looks down there and stop to gaze from time to time during the tease before settling in for some serious dining. I will often tell her how great she looks and will be specific about whatever part of her I'm viewing. Sometimes audibly sometimes only in my mind I'm saying, Damn that feels good along with all the other sounds of sex.  

There are sometimes fleeting thoughts of other times spent with her if I've seen her before. I can't recall thinking about things other than she and I and what we are about at that time and place.