1) If sexual preferences can be genetically predisposed or even predetermined, then sexual preferences can be selected for through evolution as well. This means

1) If sexual preferences can be genetically predisposed or even predetermined, then sexual preferences can be selected for through evolution as well. This means that if giant butt feathers are destructive towards actual survival, then all the female peacocks sexually selecting for this otherwise useless trait are disadvantaging their offspring and every peacock in on this giant butt feather thing will be disadvantaged. For example, let's introduce a new predator that's also attracted to giant butt feathers. It doesn't matter how sexually attractive those giant butt feathers are, the offspring of giant butt feather peacocks will be at a survival disadvantage and will be selected out of the gene pool. The ones remaining are the female peacocks who don't like giant butt feathers, and their offspring (since they're more likely to not produce giant butt feathers).