Real World 18 Reunion m/m tickling

On MTV for the next few days they'll be showing a Real World Season 18 - Denver reunion. In one flashback video they show Alex and Tyrie wrestling on the floor and as Tyrie has Alex pinned on his back he starts tickling Alex on his sides. Alex starts laughing and says something like, "No, you can't tickle me!"

I wonder how much unshown tickling actually happens in these reality TV houses.