When I was a teen ager, me and another young brother started studing with a school mate around our age.
This guy had 3 sisters who were absolutely beautiful and everyone in the neighborhood knew of them.
After the elders found out about the bible study which was held at the guys house, the elders basically demanded that either we have the study at school or my house or bring an older sister (my mom) along on the study.( obviously we couldn't be trusted around these worldly girls.)
After 2 meetings with the elders I lost all desire to even have the study, so after a while we just stopped.
Incidently, the elder that had the biggest problem - his son dated one of the sisters and committed "porneia" with her. He was disfellowedshipped because of these and variuos other activities.