That's a very good question! Whilst I was always very happy knowing whenever Debbie was out getting the extra cock I felt she needed, I think I was more excited knowing other men were getting my wife's pussy, especially when they knew she had a husband at home looking after the k1ds and even more so when she broke our rule by letting my ex-work colleague Mick take her to bed.
I'd always enjoyed catching guys check out her legs or her cleavage and this extended to me being aroused by hearing that she was often chatted her up when she was out without me. This of course meant it was only a matter of time before she was being asked out and propostioned and the natural progression of that was for Debbie to give in to temptation and to allow herself to get fucked. I saw a man wanting to fuck my wife as the ultimate compliment, though I think there is also an element of humi1iation involved in that I was unable to satisfy my wife enough for her to not need other men.
Peter C