Replying to DR. NS

So I'm not to shy about dropping a log in public toilets. If I gotta go I go, for the most part, there are some that I draw the line at. So my friend and I were in the BK parking lot which is where we always end up on our way home from a day at the hill and got on the topic of taking a crap in public bathrooms. He asked about my selection process. I told him. If there is anything in the bowl I peace out and wait for a better oppurtunity. If the seat looks to not have any unidentified brown smudges or pieces on it or suspicious yellow markings I usually just try to squeeze it out and get on with my day.

Well he claims that I have to flush first or I could catch the HIV.

 I asked him how this was possible and he proceeds to tell me that if it's a power dump and I splash toilet water with some wee that came out of an AIDS infested weiner into my bum that I could potentially get dick rot and my dong could fall off because wizz is still a bodily fluid. I told him that story was garbage but he insisted. Should the toilet be flushed?

 We decided that Dr. NS would have an answer. What do you say?

Spark Notes:

If you power dump into a toilet with clear wizz that came from a wiener with an STD and splash water into your butt hole can you catch said STD?