Sucking on fists πŸ‘ŠπŸΌ

Vanessa β€’ Married to the most wonderful & handsome man in the world! πŸ‘§πŸ»πŸ’ž born Oct. 23. 2016 & πŸ‘ΆπŸ½πŸ’š born May 2. 2018 β™₯️IG: DwyerBearFamily
Any other 3 month olds doing that right now? Is it self-soothing or preparing for teeth?