I was thinking about the first time I saw my wife with a guy's cock in her mouth and then thought, no, the first time I saw a cock going in and out of her pussy and then thought that the first time I saw her getting fucked in the ass was the most erotic thing, but maybe it was the first time she "snow balled me". Watching her get fucked " airtight" was very special. It is really hard to saw which of her slutty behaviors turned me o the most. I would love to hear your experiences.