For me the cuckold its witnessing her hot attractive body get fucked by a very in shape and hung cock that satisfies her in a way I cant and realizing she is too fine for me physically and deserves to be sexually pleased by an equally attractive alpha male . I think at the same time its seeing her enjoy and get into being fucked by her lovers huge cock and seeing their chemistry together as a couple sexually and enjoying hearing her tell him how much better and bigger he is than me and how much she needed fucking then telling him to cum in her pussy at the end and how much they both enjoy experiencing that together.. And when he gets off of her how gaping wide her pussy is stretched. She had admitted before how she likes making her lovers cum and how they stretch her pussy out to fit. .. Thats the physical part and the act The other part, emotionally, is the talk afterwards or later when she is falling for her bull and she tells me how much she needs him and where that could go. She did fall in love once for a little while and we discussed exciting topics from moving him in to her staying some with him and him doing everything with us from grocery shopping to vacations and eventually possibly pregnancy. So that was very exciting too, the fantasy or planning part.