If a person who is in a relationship flirts/writes/tries to hook up with someone else, would you call that cheating or no?

I am asking this more as a language question than a “moral” one, would appreciate answers from native English speakers

This falls under my definition of cheating
No it takes at least a kiss to be cheating
No cheating is just with actual sex
Other
Select gender and age to cast your vote:
If a person who is in a relationship flirts/writes/tries to hook up with someone else, would you call that cheating or no?
Post Opinion