When it comes to Brooks Nader, a bikini top is always optional. The “Baywatch” star, 29, once again ditched her top while on a luxury yacht in Positano, Italy with model Jack Lumsden on Thursday. In pics obtained by Page Six, Nader hugged a shirtless Lumsden close while wearing a white eyelet bikini top, then later took it off while another male friend hilariously tried it on. Nader was in danger of a wardrobe malfunction, as her towel hung low around her breasts. More glam shots of Nader included her smiling big with a drink in hand, and her striking a picture-perfect pose while leaning over the yacht’s railing sporting big black…
