The infidelity or just the gossip about it? I can't say for sure, but I think the workload required (in school) for an "engineering major" vs. "business major"

The infidelity or just the gossip about it? I can't say for sure, but I think the workload required (in school) for an "engineering major" vs. "business major" has something to do with it. If college shapes you, that's definitely the mold. The party'er types are weeded out. Could also be long term decision making vs short term, impulsive vs delayed gratification. Engineering is mostly long term thinking about what can go wrong.