J.B.
I agree. I think it's a soothing, relaxing technique following increased hand coordination. Probably isn't an allergy, unless you're wearing a perfume and/or lotion that could be irritating his eyes during nursing. But if that were the case he would probably have a runny, itchy nose also. My 4 month old daughter recently started the face, eye and forehead rubbing during nursing to. Sometimes it's kind of cute....Just have to keep their fingernails short!