I don't mind my boyfriend watching porn, when i'm not in the
mood for sex he can just switch it on whilst I do other things. I
find porn quite boring anyway, it's always the same recycled " plot
"
True, most vids feature roughly the same acts, even with
different actors/actresses...... but won't mind seeing a few more
times if I find the actress/es chio, though......
On the other hand, it might not get so boring for you though, if
you were making/starring in it yourself...... 
