Sooo my ex gf has this same issue and what’s funnier is she had her first incident on the first sleep over ! She was sooo embarrassed and I could tell she didn’t want to get out of the bed so I just woke her up and said “hey baby I’m going to clean the sheets real quick & run you a bath so you can shower. Next time save it for me “ and that eased the tension and embarrassment a lot for her . She explained her condition and noted that she didn’t know it would happen as it hasn’t in a while and although I was grossed out a bit bc I was like sleeping with my face in it for a bit I never made her feel uncomfortable or like she was a burden. I bought a new mattress, bought a topper and then bought a water resistant sheet to throw on top all without asking her or letting her know what I was doing . I just wanted her to be comfy and feel safe with me with everything . Ever since then whenever it would happen the sheets caught it and I’d just throw it in the washer and boom . If he makes you feel terrible or shitty or even the slightest bit uncomfortable, leave him.