biker's back

and the oddest conversation popped up.

My gf and I were watching some movie last night with a sex scene and my dirty mind shifted to more interesting ideas then people under sheets. So anywho, I brought up the topic of guys in porno's going down on girls in porno's and why it seems they dont really go down on the 'popular' or girls that get alot of cock.

I was then informed its more then likely because they smell bad. This bad smell would be attributed to lots of different cocks being inside of them. Something about bacteria and so on.

Now what I'm wondering is, if this is true or not? Even my gf noticed in porns its just the 'new girls' that get eaten out.