Swimmers have been warned to stay away from a sexually frustrated dolphin off an English seaside resort after it tried to lure unwary humans out to sea in a bid to mate with them. The bottlenose dolphin, nicknamed Georges, arrived off Weymouth, Dorset. âThis dolphin does get very sexually aggressive. He has already attempted to mate with some divers,â United States marine mammal expert Roc OâBarry said. The dolphin has resisted attempts to move it.