In fact, I will fantasize about bottoming for a guy based on seeing only his ass. Never really caring if I ever see his dick.
Now, just because I'm a total ass-man, that doesn't mean that I will turn down the chance to see a beautiful dick. And since I'm not by any means a size-queen, I don't care about his cock size.
I'm a happy camper as long as there is a cock to fantasize about letting in my ass. Be it just inside the hole, deep enough to massage my prostate, or so deep that the more he thrusts in my ass, the more latex or pre-cum I can taste.
My next favorite body part to base my sexual fantasies on are his legs.
I love a nice strong pair of legs, especially his calves. It helps me to imagine him having the muscles to push hard and deep into my ass.
Seeing a man's chest and arms are not big concerns of the sex in my fantasies, or real life. I am however concerned about his stomach. I don't care if it's his abs are washboard. However, if his wearing only a shirt makes him look like he's wearing the old maternity tops women used to wear, then I'm turned off. And that is not a statement of fat-shaming. I'm just stating I'm not normally into larger guys. But I have had a couple of husky guys in my day.
Well, if you like the photos in this post, then you'll be glad to learn that I have over 40 more photos in my public Dropbox folder labeled "No Pants", and check out the slideshow I made up. So enjoy.