How about after you’ve talked with him?
Is there anything that is a guaranteed indicator of a guy being good in the sack?
Just curious.
This appears to be an opinion poll, (and I am not sure what citations would work to supoport any “debates” on the issue), so I will nudge this over to IMHO.
No.
If he seems both considerate and like-minded, that’s a good sign, although not definite.
First hand experimentation is the only way to be sure.
There’s nothing like a test drive…
No, but my limited experience indicates that “it’s in his kiss” is actually a good indicator. The bad kissers I’ve met have been lousy at more-advanced items, the good kissers - yum. I think it’s because most of the bad kissers (and bad other things) have some sort of “recipe” that they follow no matter what your reactions are; the good ones “listen” to your reactions.
Nava nailed it. Can’t tell anything by looking or talking (well, other than that you’d like to find out more), but you can tell pretty much all you need to know by kissing.
I’ve never found that to be true. A few good kissers were great at everything else, a few were only good at kissing, and the latest, while great at everything else, is not a good kisser, though receptive to instruction.
You can’t tell by looking and you often can’t tell by talking to him, either, though if he’s the kind who has a certain bad attitude toward women, he’s not going to be worth your time if you do decide for some crazy reason to have sex with him. I will say that in my experience, geeks are better than others.
If he can actually listen and ask questions as opposed to talking all about himself, that’s a pretty good sign that he’s probably good at give-and-take in the bedroom as well.
I can’t always tell when a guy will be GOOD, but I can generally spot the ones who will be BAD, if you know what I mean. Occasionally I predict good and am disappointed, I’ve never predicted bad and been surprised. (Not that I generally sleep with men expecting them to be lousy in bed, but my friends have slept with some people I’ve speculated about, and I’ve not been wrong by their reports.)
Geeks, guys into yoga and serious martial artists tend to be high on the good list. Bodybuilders tend to suck, and not in a good way.
Yes. Lots of times, I’ve looked at a man and thought, “He looks like he’d be a lot of fun in bed.” The couple of times I took the opportunity to find out, I was right.
So, ladies, what you’re basically saying is that this sock full of quarters I keep stuffed down the front of my pants is doing me no good?
Well, if it helps, we can go to a laundromat together and keep the washer on spin all night. 
You should use 50 cent pieces…
Stuff with $100 bills and your luck might improve.
Like when he licks his eyebrow?
I don’t think you can tell by looking, but I know that there are men out there that you can tell for sure after talking to them that they are going to be bad in bed because they are incredibly rude/self absorbed/whatever. Most men would need to be tried on for size before you could determine if they were any good or not though.
IMHO the best lovers are guys who find it a big turn-on to turn women on (i.e. they like giving just as much as - if not more than - getting). This is not something that can be faked.
Some men who are like this can make this clear in conversation without being skeevy about it.
Those men are rare and special indeed, and I find they are usually richly rewarded.
Well, hell, if I had that kind of money I would just stay home and masturbate, utterly smitten with myself.
If he has a temper and cannot take criticism in everyday dealings, he probably won’t appreciate your helpful suggestions in bed.
Can you ladies give some specifics on just what being “good in bed” entails?