It doesn't turn me on per se, but It makes guys feel as if the girl trusts them a lot. ofcourse they are not thinking of their own father, but I think it's because girls I've been with look up against a father figure, because their father cared deeply for them, so them calling me daddy makes me feel special.
Girls don't really think of like acutal parents when they say this (that would be creepy) but its like drips sex. not litterally but its like a guy calling his girlfriend/wife sexy "momma"
a lot of guys actually like this, 'cause it turns 'em on.
Most Helpful Guy