Search Results: when other girls flirt with your boyfriend

Say i have a boyfriend and i want to test him to see if he would flirt/cheat with other girls behind my back. What if i were to create a catfish account and get a random pretty girl as my profile picture and start flirting with him just to see if he would dismiss/ignore me, or if he would take the bait and flirt back with me? And if i were to ask him if he wanted to meet up for sex to see what his answer would be? If he says yes, then i would know that he would for sure cheat on me if giving the opportunity, and that i could no longer trust him. If he says no, then i would know that i COULD definitely trust him. Do you think this is wrong? And because i want to play devils advocate, isn't it kind of a reasonable paranoia to not completely trust your SO these days? because i think with all this technology, it makes it so much more easier to cheat these days. Just a thought.
And this situation could be reversed obviously with a GUY testing to see if his girlfriend would cheat on him if giving the opportunity by creating a fake account. I feel like i have to say that so guys don't jump down my back saying girls are horrible to do this, a guy could do it too.

(And by the way, I'm NOT saying i would do this personally, i've never even been in a relationship. But I've heard about this, and i was just curious about what people thought of it)