We take a look at 1 Cor 6 from another angle, noting the clear context of 1 Cor 5. Yes, believers are capable of falling into all kinds of wickedness if they follow the carnal nature (the flesh). This leads to Paul's instructions for marriage in 1 Cor 7 which we then contrast with his Post-Acts instructions in 1 Timothy. We get our Acts and Post-Acts doctrines lined up and rightly divided. Are you settling for a lesser hope?