Cum spitting??

My boyfriend is really into sucking his cum out of me after he cuma into me and then spitting it into my mouth and having me swallow... I've tried it a few times but literally everytime I just want to barf the biggest turn off. I've tried it a few times but literally just thinking about it makes me sick.. Ill swallow cum fine it's not that. I swallow😉😂 lol but just the whole idea of him sucking it out of me and spitting in in my mouth is disgusting to me.. Any ideas or tips?😅