Poker Face, by Lady Gaga
I wanna hold em' like they do in Texas, please
fold em', let em' hit me, raise it, baby stay with me (I love it)
love game, intuition, play the cards with spades to start
and after he's been hooked I'll play the one that's on his heart

oh o-oh oh oh, o-o-o-o-o-oh
I'll get him hot, show him what I got
(2x)

can't read my, can't read my
no, he can't read my poker face
(she's got to love nobody)
(2x)

p-p-p-poker face, p-p-poker face
(m-m-m-ma)
(2x)

I wanna roll with him, a hard pair we will be
a little gambling is fun when you're with me (I love it)
Russian roulette is not the same without a gun
and baby when it's love, if it's not rough it isn't fun (fun).... and so on

Throughout the song there is reference to gambling, and her "poker face". Then the references switch to love and "when it's love, if it it's not rough it isn't fun", the repetition of phrases referring to gambling go through the whole song. These phrases however usually go back and forth between gambling and then love. The gambling references are referring to how love and being with someone is a gamble and there is a whole game to winning a person's heart (or something else?), and using your "poker face", or playing hard to get. The extreme repetition of gambling references, like "Russian roulette", and then pairing it with the next lyric about love or lust "bluffin' with my muffin", shows this relation. Using gambling lingo to talk about love though gives the song a seedier feel, and makes it feel much more dark, than using a different comparison like spinning and running through a field (like 'Accidentally in Love, by Counting Crows). When talking about gambling, images of casinos come to mind and all of the things that happen there or start there, drinking, gambling, and sex.