Will I get HIV or STD?

Will i ever acquire HIV or STD (on second time oral sex) if my boyfriend (who has never had sex or had performed oral sex on and has NO HIV or any STD’s) ejaculates in my mouth? and same goes if i have an open cut or open sore in my mouth when he ejaculates and comes in contact with it….. will these both two situations acquires me to have HIV or STD’s or only one of them two situations or actually NONE?

Thank you so much 🙂