Men cheat more IMO. Most men I've been with cheated on me and all female friends I know have been cheated on at some point. One friend I know her ex slept with 17 women whilst with her! (She found all the pics on his phone)
Yeah I know a fuckload of women who have been cheated on by their man/men, and on some occasions, more than once, with several different women. They do it, coz they can, coz they think it's their right, and because it's 'natural' for a man to wanna spread their seed!
(I have actually known a man say this - a b/f of my friend - when he was caught fucking another women.')
Women on the other hand will cheat much less often, (in general,) and it will be (as I said earlier,) because she is unhappy in the relationship and possibly being treated like crap by her man. Women don't cheat when all is good in the relationship; men do.
This is all true, despite the MRA's on here saying differently. Sometimes, when I see people on here fervently defending men, I swear it must be men saying it. And it's the same people who claim it's perfectly ok for a married man to have a close, personal, flirty relationship with a single female (colleague or friend,) and any 'wife' who is upset about it is clingy and needy and is going to push him into the other woman's arms!....... 
Weirdly, they never defend any married woman who has a very close relationship with a male colleague, when a man comes on here saying his wife is getting up close and personal with a male colleague, and it's upsetting him.
oh wait... Yeah, that's coz that NEVER fucking happens! It's only married MEN who have close, cozy relationships with female 'friends' and colleagues. Married women never do! 