Mark's a lot of things. Mark's homeless, Mark's "straight", Mark's pretty calm, pretty laid back.
And then he meets Jack. Now Mark's a lot of other things. Mark's bisexual. Mark's confident. Mark's sexual, he likes sex. Mark's in love with Jack.
Jack doesn't feel the same.
They're friends with benifits.
Mark wants to change that.
Jack just wants someone to fuck around with.
You see the problem?
Who said love was easy? Who said sex was easy?