is my boyfriends cum normal?

hey guys, when my boyfriend ejackulates his cum comes out as one small thick blob.it looks like mucus.sorry i know sounds gross.weve been together for four years and i don't remember if it has always been like that.with my other partners it was always runny and there was more.i know everyones different but it doesn't seem normal to me.he also has been getting bad breath.i'm thinking it could be from toxins in his body or maybe his cum is normal.any advise would be helpful.thanks!!!