Jax Taylor is proving he has a sentimental side. He recently got a new neck tattoo in honor of his young son, Cruz Cauchi, who he shares with ex-wife, Brittany Cartwright. In the past, Jax Taylor has had several tattoos inked onto his skin. From matching tats with Brittany Cartwright to skulls on his arms, the former Vanderpump Rules star doesn’t hold back. Jax Taylor shows off neck tattooThe Valley’s Jax has just got some new ink! He had his son, Cruz Cauchi’s, birthdate and zodiac sign tattooed along the side of his neck during a trip to Canada with Tom Schwartz. He wrote, “The amazingly tal…