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Try getting each of you a separate sheet. If you have a decorative bedding set you don't want to change, the second set can be kept in the linen closet or in under-bed storage until bedtime each night. Your covers may simply be too small for both of you! Try getting a size larger than your bed--if you sleep in a queen size bed, get a king size set Many people steal sheets because they are just too far away from their partner to share. If it's an option, a smaller bed might be a good solution. Try sleeping in a queen or full-size bed--it may be impossible to steal sheets! If you really can't get comfortable and no other solution has worked for you, separate beds may be a last resort to prevent further relationship stress. You don't have to sleep in separate rooms. Try pushing two small beds close to each other.
Use separate sheets. Buy a larger bedding set. Get a smaller bed. Try sleeping separately.