If you caught your partner in the act of cheating, would you fight the guy/girl your partner was with?

So I asked this question simply because after watching Jerry springer and talking to my neighbor. I’ve always wondered why do people fight the person their partner is cheating with? What you thought was yours just was proven in front of you that it wasn’t at all.
If you caught your partner in the act of cheating, would you fight the guy/girl your partner was with?
If you caught your partner in the act of cheating, would you fight the guy/girl your partner was with?
If you caught your partner in the act of cheating, would you fight the guy/girl your partner was with?
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