Depends really.
You say your lads would cheat on their lady. I know my mates and me would not.
Are there really that many morons out there to make the 75% you say? Very sad if so.
It must be the company I keep and it's nothing to be proud of but I can only think of one mate who I know who hadnt ever cheated because he loves her , one who doesn't bevause he's terrified of a lonely life and one bevause he's got no chance ever and both the last two have in the the past. The other 99% of mates and casual mates have cheated many on numerous occasions.