Like other corruptive influences, the bad effects will be obvious to us long after the damage has been done. A little like the Catholic Church, which allowed active homosexuality to flourish in seminaries and dioceses, and then ended up with priests (in Boston) promoting man/boy sex and then with raped and molested teenage boys all over the country.
There is a spiritual component to sexual corruption that is difficult to discuss on a pluralistic, secular thread.
The reality is 'we battle not against flesh and blood, but powers and principalities'. The enemy knows us exceedingly well and exploits disbelief to maxium effect.