It makes me cringe when he sings that bit in front of my 7yr old and my 8 & 10yr old nieces. Some stations do blur it out but I personally dont think it's necessary to sing that on a song.
I expect she was a willing participant, and thought she'd used him as a sex toy, good for a shag, when she got bored trying to understand the offside rule.
I do accept that the song would not scan so well if the lines were ...
"Meet a really nice girl,
Ask her on a date, maybe see her again, get to know each other, see a bit more of each other, if we get on well enough then perhaps enjoy a physical relationship"
So I guess, for now, we're stuck with a song which says ...
If I'm bored, I'm going to go out and find a woman, and give her one.