The splints work by pulling your bottom jaw forward. Try it now, stick you bottom jaw out as far as it goes so you have an underbite. It holds it in that position all night. Some people can't have them because you have severe TMJ pain, (the joint just near your ear where your jaw joins your skull) fromt holing their jaw in that position for so long.

TBH the splint was a bigger turn off. If i wanted to kiss and snuggle, it was like him having to take out false teeth, and then he would have the go and brush his teeth becasuse he would have bad breath from having a mouthguard in.. And it makes your drool.

Google cpap machines and have a look at the different masks.