BABY COOLS DADDY’S HOTS

Speaking of JOHN STAMOS, he’s coping with a Fuller House since new wife CAITLIN McHUGH, 32, made him a first-time dad at age 54 with the April birth of son BILLY. John, now 55, complains the kid’s turned into a turnoff when he and his young bride try to cuddle. “We try to do it fast, and

start hearing this ‘wah wah.’ He screeches like Saved by the Bell and that ruined the mood … He’s got this elephant, and he learned how to press it, and it starts singing, ‘Do your ears hang low?’” The good news is Caitlin vows they’ll get back on track between the sheets, because she wants a sibling for Billy, “to keep him grounded.”