Idek how to title this

When I'm receiving oral from my bf I my body gets warm and then there's a huge rush and then there's a huge puddle in the bed and idk what's happening and I feel bad because he has washed his sheets 3 times since Monday idk what to do can I make it stop or at least not get it on the bed.? He doesn't complain and seems not to care but ik he's definitely tired of washing his sheets everyday.