Originally Posted by mineistaken

Well this is all good and I know that you can have sex on a sofa. I am just used to have it on the bed.
Two things: it is more ccomfortable on the bed + if you have it on the sofa her or your bodily fluids often "ruins" the sofa. For those 2 reasons I always went for the bed.

As for:
"Excuse me while I prepare the sofa bed" may kill any moisture between her legs.

Well that was the main point of the thread (not that you should phrase it like that, but even if you are cool about it), preparing sofa bed is an obstacle...