Oh ya, I think about it a lot. I'm a Bottom and I have a special friend that is a Top. I don't mean to sound like I don't get satisfaction but, being a Bottom, I can enjoy sex long after I have gone soft and not able to get it up again. Needless to say, I'm still enthusiastic long after he is spent and no longer able to get hard! I think of how nice it would be if there was a fresh one to slide in me after he no longer can.
I did get gang banged once, if three guys count as being gang banged. I have a huge latex fetish and I arranged to have some rubber fun with three other guys that I knew fairly well that were also Rubberists. We had not planned or talked about actual sex or anything but, we all got into full head to toe latex catsuits and really horny. One thing just led to another. In a moment of weakness, I told them I wanted them all to bareback me and shoot inside me. Boy did they, all night long, every time they could get it up! It was FANTASTIC! There is nothing in the world like the feeling of a guy sliding into me after I'm all slick, wet and squishy inside from the guys that went before!
I got worried afterward and got tested again, twice! I won't do it again but, I think about it a lot. Anyway, my buddy and I are monogamous and he always bare backs me, so I have his safety to think of also.
Just a note though, don't do it. I'm not trying to say anyone should do it. I'm just saying how it made me feel. Lot's of things feel good that are not good for you.