That answer heavily depends on the individual. Of course, some folks have very specific needs an interests, and need a certain amount of intimacy and comfort be

That answer heavily depends on the individual. Of course, some folks have very specific needs an interests, and need a certain amount of intimacy and comfort before getting there. And they absolutely should! My broad point was that it's not universal. And for a lot of people "sexual chemistry" is something they want to evaluate from the very beginning. Even they will probably admit that it takes more than 1 or 2 attempts to validate.