An interesting survey results published on aol shows that people age around 30 is most likely to cheat:
Q: Would you cheat on your partner if you knew s/he would never find out?
Survey Says: Although most people wouldn’t cheat, people in their 30’s are more likely to cheat.

Yes, We Would Cheat
Ages 20 to 29: 7 percent
Ages 30 to 39: 11 percent
Ages 40 to 49: 9 percent
Ages 50 to 59: 9 percent
Ages 60 to 69: 8 percent

But this age group is not the most likely age group that will break up after the person finds out his or her partner cheated on their relationship. It’s the youngest age group:

Cheat and It’s Over Q: Would you stay in a relationship with someone who cheated on you?
Survey Says: Most wouldn’t, but those in their 20’s are least likely to work through infidelity.

No Way
Ages 20 to 29: 54 percent
Ages 30 to 39: 48 percent
Ages 40 to 49: 43 percent
Ages 50 to 59: 44 percent
Ages 60 to 69: 44 percent