Oral help needed

My boyfriend and I one day were talking about sex and what we did or didn’t like about it. He say his like when I give him head but not messy so my reply was in shock was you don’t like sloppy head he say yes but no , I like sloop neat head, I ask him what does he mean ?... he explains he like a little bit of spit an just the slurping an ect lol ... my Issue is I have big lips so I always had spit /saliva in my mouth on in my lips and my gag reflex isn’t the best ... I have tried different ways an cleaning my sloop mess up afterwards but he still wasn’t feeling it .. I’m running outta answering .. some one please help me!