What should my feelings be about wife kissing another man on stage?

My wife gets involved in a lot of theater and will be trying out for a roll over the next few months where she will be kissing some other guy on stage. Now, let me say I can deal with this, but get into debates with her about whether this is real in the sense that, if she’s attracted to the other guy, it pleasurable and not benign. Again, I’m comfortable enough to deal with it, but argument is over calling it what it really is. Does the context make it benign, don’t feelings between the actors exist?