If you can't do it in front of your partner and your partner is not a psychopath from the Lifetime "women in peril" type movies, then yes, it is cheating. If u hide your phone from your partner and/or look for a private space to text someone other than your partner, then yes, it is cheating. If you are sending photos of the body parts your partner gets tickled by you with, then yes, it is cheating. However, if ya'll are swingers, then its all in good fun! It depends on the parameters and guidelines set forth by you and your partner. If you have to ask, then you most likely know the answer, but are hoping on little orphan Annie's heart locket that we say its not cheating, so u can have fun! Live! If you or he can do it w/o guilt, then dont let us make u feel guilty. Everyone has a different threshhold and we're all gonna die anyway. Might as well die having done all the **** we wanted to do!