Im an Aries male, I would say no they don't cheat as long as you keep them busy. I mean we get bored very easy. I would never want to cheat. so as long as I'm with someone that compliments me and is as outgoing and energetic as I am then I'm happy. an Aries man only gets better with age as he will learn to be patient and care more for others in time. if your serious about an Aries man you should keep an open mind and lots of communication because MEN DON'T READ MINDS ( like women often do ) lol.
Star sign should have nothing to do with who you are with. You are with them because you like them, not because someone says that you are supposedly compatible with them.
Capricorns and Scorpios are the best in bed, NOT Aries! haha, but anyway....
Scorpios are the sex-fiends, apparently. Actually, Aries do not tend to cheat on their significant other. Aries and Gemini are a very compatible duo. So yeah.
One day you'll wake up and realize that when you and your partner were born have no effect on how well your relationship will work out unless you let it. Until then, good luck making a relationship work.