By your reasoning, it would follow that we should keep all our preferences just as they are and never change them. But actually we have many reasons to want to change (other) preferences that we consider valid.
For example, we want to reduce violence and war. We want to reduce overeating in the presence of food superstimulus. We want to be attracted to and happy with average human partners in the presence of media-sponsored super-beautiful models. We want to reduce religiosity (although this is more controversial among humans). We want to reduce akrasia, which derives in part from time-discounting of preferences. We want to eliminate various biases.
All these things are places where we want to go against our evolutionary preferences. At the very least we support one preference over another. And similarly, I support and wish to increase the preference for sex over the preference for modesty, chastity, and sexual guilt and shame.
By your reasoning, it would follow that we should keep all our preferences just as they are and never change them. But actually we have many reasons to want to change (other) preferences that we consider valid.
For example, we want to reduce violence and war. We want to reduce overeating in the presence of food superstimulus. We want to be attracted to and happy with average human partners in the presence of media-sponsored super-beautiful models. We want to reduce religiosity (although this is more controversial among humans). We want to reduce akrasia, which derives in part from time-discounting of preferences. We want to eliminate various biases.
All these things are places where we want to go against our evolutionary preferences. At the very least we support one preference over another. And similarly, I support and wish to increase the preference for sex over the preference for modesty, chastity, and sexual guilt and shame.