While reading a recent review I had to re-read the following several times.  This was an outcall to the reviewers home.  

" ... enjoyed each other for several minutes. I told her that I wanted to taste her nectar. She eagerly obliged and shortly shot a huge dose of her juice into my mouth. It was more than a mouthful and I let it sit in my mouth then swallowed. It tasted wonderful. She continued to BBBJ but I couldn't finish. Maybe I was concerned that my wife would be home shortly."

Living on the edge I suppose.  The BBJ oral to completion before wifey comes home is too wild.  A welcome home kiss might have been awkward!

No telling but thats a big part of it....

I read the same review/comments.  I'd say the turn on for him is the fear of getting caught and doing crazy stuff in his own home.  I did a little research and that member has 1 TS review and 1 GG review, never posted on the TS Board.  The BBJ oral to completion seems to be quite common in multiple reviews.  I hope he did not floss before his erotic swallowing session.