Anyone know what song this could be?

Crap. I just watched "Teachers", great series, with that bloke who was so charming in 'Love Actually'. Anyway: while teacher Simon was trying to get his police-officer girlfriend Maggie back, there was this brilliant song playing in the background, it had a very catchy tune, but I only remembered some of the lyrics. That'll teach me to write stuff down as soon as I hear it. It was some sort of mock love-song; after the lalalala's and 'loving you' (or possibly 'making love to you') the singer continued how he'd rather be doing it inside his head and then sung he'd rather be doing something else instead. I thought it was funny and wish I'd paid more attention. Any ideas, my dear flist? Anyone?

ETA: thank you tanisafan! I found the song: it was "Lazy Lover" by The Supernaturals
( Look: lyrics! )

*off to find that song*