If the key to a successful marriage is having the same sense of humor, then Luke Combs and his wife Nicole should be able to look forward to a long and happy life together. Combs celebrated his 34th birthday on Saturday (March 2), and as he thanked fans for all their well-wishes, he also unveiled a photo of the quirky gift he received from his wife Nicole: A taxidermied squirrel posed as a cowboy, complete with a wide-brimmed black hat, riding what appears to be a pheasant. In this case, the pheasant is playing the role of the cowboy’s bucking bull: The squirrel holds onto its reins with one p…