And this is how it starts
Take your shoes off in the back of my van
Yeah my shirt looks so good,
When it's just hanging off your back
And she said, "Use your hands and my spare time—
We've got one thing in common, it's this tongue of mine."
She said
She's got a boyfriend anyway

there's only minutes before I drop you off
All we seem to do is talk about sex
She's got a boyfriend anyway
She's got a boyfriend anyway

I loved your friend when I saw his film
He's got a funny face
But I like that 'cause he still looks cool
She's got a boyfriend anyway
She's got a boyfriend anyway

Now we're on the bed in my room
And I'm about to fill his shoes
But you say no
You say no
Does he take care of you
Or could I easily fill his shoes?
But you say no
You say no

And now we're just outside of town
And you're making your way down
She's got a boyfriend anyway
She's got a boyfriend anyway

And I'm not trying to stop you love
If we're gonna do anything we might as well just fuck
She's got a boyfriend anyway
She's got a boyfriend anyway

You've got your tongue pierced anyway
You're in your high tops any day
You're in your skinny jeans anyway

You and your fit friends anyway
I'd take them all out any day
They've all got backcombs anyway
You've all got boyfriends anyway

In the song Sex by The 1975, it is about a person who longs for someone who is in a relationship and acts on their desire, even though they know it would go against the person's relationship. The singer talks about the scenarios they imagine with the person, but at every step, the person in the relationship is reminded that they have a partner and withdraws. The lyrics convey a certain understanding that a physical relationship without emotional attachment is often seen as something that should not be pursued, and that those in a relationship should respect their bond.