Help me find out the name of this rap song?

I randomly heard this song and I thought it was funny but I can’t remember the exact lyrics. I think it might be sort of R&B/rap sounding and it’s a guy talking about how he’s sleeping with this girl but she’s married to this other guy or whatever, they’re just for messing around.
And the only lyrics I remember was this part where he says something about did you show your guy that new trick how you taught (?) to smoke a cancer stick…
Something like that. But me and my friend are trying to figure out what it is so help would be appreciated.