Thoughts on cheating

So I had posted yesterday regarding how my boyfriend told Cheating is not a big deal and I thought I’ll give more context to it.. He’s been cheated on twice in his earlier relationships.. He basically told me something along the lines of “I find cheating is not a big deal because it isn’t done with an intention to hurt someone.. It happens spontaneously at times because you can’t control your emotions and you start to get feelings for the other person even without realising”.. He also told me that he generally believes in that perspective and doesn’t mean he will cheat on me, but don’t mind if i do on him.. As told before I completely disagree with him, with my dad having cheated on my mom.. I really love him and I’m trying to understand his POV and I’m really confused.. He’s never disrespected me and always showed me he loves me and even shares his location with me at all times (he insisted we do this) but I’m just so disturbed by his opinion..