There’s no right or wrong way to do this without sounding desperate because you are working against the typical pattern of things, usually Relationships lead to sex and you are looking for one without the other. You’ll get different reactions from different people with different personalities and backgrounds but if you’re observant enough it shouldn’t take you long before realising if both of you are on the same page without needing to ask this stupid question flat out.
I think openly telling women “I just want sex” targets them and makes them feel disrespected so in minor cases you’ll get a yes, in other cases a no or a slap in the face. The idea that men or women can be used as a sex object is not a good one, even finding many who are willing to do it does not mean this is the norm, people develop trust and commitment issues for a reason and in many of those issues can be tracked to the point where either gender treated the other as a sex object so careful what you’re after because one day you will be treated in such and not in the way you’re hoping it would be. I am surprised to see women give you ideas to pull this ‘trick’ it just shows where people’s morals are and that their heads are literally in their genitals, one of the things that support us from Animals is instinct and now that it’s being demolished we’re not all that different anymore, if anything given the global direction we are a step behind Animals.
Some people can be so emotionally vulnerable that they would say yes just to feel accepted or desired by the opposite sex, would that make you feel accomplished? I treat women exactly the way I want my future daughter to be treated so if that’s what you’re after be careful when things turn around, karma is real and it doesn’t forget anything.