Did you ever bang a broad in a dumpster?

Dude...I get so much tail it's NUTS...effing INSANE! I was at McDonalds tonight and this smokin' chick was taking a Big Mac container out to the dumpster. She motioned me to come into the dumpster area. When I did she said "I'm throwing this Big Mac out, but I want you to throw yours all up in me". Dude, we jumped in the dumpster and I handled my bidness. My question in all of this is this: is that even sanitary? Is it possible to catch a disease having in garbage? I'm a ladies man so I don't wear condoms but my friend told me that if I am banging a chick who is willing to have in a dumpster I should be more concerned with STDs than anything I could get from the garbage. Thoughts?