Personally, I'd rather they see two people fuckin' then people getting blown up, shot, beheaded, having their guts torn out, dismembered, set on fire, melted with acid, run over with a truck...you get my point.
However, I think it largely depends on the context in which said porn was provided. If it was a case of "Here ya go, have fun" then fine, whatever. If it was just to perv on them and try and wiggle into their pants...fuck no.