It's illegal to do anything sexual with a 13yo so you don't. When she is old enough she can tell you herself what she likes because no one else will know since we are all individuals and like different things.
you can make girls horney by playing with their nipples or having sex talk with them,like phone sex or just talking dirty..some girls don't like that but usually theres spots where you can touch on a girl that will make her horney.
A horney toad in its street name would be refering to a person who is horney and likes to suck on things or "eat" them when they are "wet". This is the meaning that I learned when I was in school. Correct me if I am wrong but I am pretty sure that this more refers to men.. :)
The issue between Sigmund Freud and Karen Horney was they have different point of views on the development of humans. Freud would biological process when analyzing women and Horney thought what was not good.
it can be difficult because most 15 year old boys are pretty hard headed. but basically 15 year old boys think with their cocks, not their brains. Getting them horney would be a great way to lure them into your plans