Hi YelloLab,
I don't have any experiences worth mentioning though I do know the PO in my old cong got turned in by a sister because he was trying to smooth his way into her pants. She was my housekeeper and told me exactly what happened. He ended up deleted and his pioneer privs. were taken as well as the regular privs you lose when you are publicly reproved. She got the same punishment though she was innocent in my opinion. He would "counsel" her alone and gave her advice on her medication for severe bipolar illness. He took advantage of her in my estimation. She was very humble and didn't even complain to me that she was disciplined for his actions. She was one of the sweet and pure souls of the earth. I miss her.
I don't think JWs have affairs more often than the general population. I do think that they will be more clandestine about an affair. They will be more devious in hiding an affair than regular people because they stand to lose family and friends if they are caught. JW policies can drive people into a more tangled web of deceit.
Heather