Leostar, you can't go by the horoscope to find the most ticklish girl. It would be like using the horoscope to find the most intelligent girl. Doesn't work that way. And looking at just the sun sign is too vague anyway.
You can look at the zodiac to help yourself predict conflicts and agreements you will have with a potential partner in the long run, when you reach the phase where you're really being yourselves with each other. But the horoscope will do you not much good in forecasting initial behaviors. It'll tell you something, sure; but initial behaviors are mostly chemical.
And tickling too. It's mostly chemical. Your most ticklish girl, whatever her sun sign, will be the girl whom you touch the right way, whom you keep happy and feeling alive, and who understands that tickling is a language and an art for you.
Your most ticklish girl, Leostar, will be the girl whose aura brightens because you step into the room.
That said, Virgos rule the nervous system, Pisces rule the feet, and Aries women are just so damn adorable.
Tickling the zodiac,
Boombaroom