It's in the Daily Mail today so therefore it must be 100% true.
These poor guys, evidently, can't help their hormones or need for variety so rather than discuss it with the wives they love so much (in case the little dear gets all tearful or something) they keep quiet and go and make use of some willing, convenient, available woman.
The fact that he keeps it secret is proof that he loves his wife really.
So, that's OK then.
Phew! And there was me thinking they were thoughtless, selfish wankers. Shame on me.
www.dailymail.co.uk/femail/article-2158915/Is-husband-having-affair-actually-proof-loves-you.html