My advice is that if you are in a relationship , don't cheat. Just be single and date as many girls as you want.
Such advice won't be followed. Similar advice in this thread is beating a dead horse.
What
@cola,
@Max Baker, and others have already done is either accepted the moral implications of their desire, or totally don't care, and want to do what they want to do. You don't have to agree with them.
@cola isn't seeking feedback on the ethics of his choices, rather he's more interest on getting input on how he could fulfil his desire to have his cake and eat it too.
Y'all in the "Don't cheat" and "Real men
this, real man
that" crowd are just pushing your morals onto the OP. While I personally believe morals are subjective for the most part, I concede that most people would align in camps that wouldn't encourage OP's desires. But he doesn't care.