I recently went to an escort and unprotected oral was performed by me, while the oral sex I received was protected. The escort did not ejaculate (yes, a trans) and I've even been told by her that biting could leave small cuts through which any diseases could be contacted. She seemed to be careful enough. Regardless, my question is what are the chances of STDs or STIs through unprotected oral sex without ejaculation and if cleaning my mouth afterwards with products such as Listerine is useful