Squeezing the Nipples
When a girl lets you go under her shirt, the act of squeezing and rolling her nipples in between your thumb and forefinger. You can also suck on them and gently bite them, to get her turn on. Girls love this.
Bob: "I went to 2nd base yesterday"
Frank: "Lucky! How far?"
Bob: "I got all the way to squeezing the nipples."
Frank: "Lucky! How far?"
Bob: "I got all the way to squeezing the nipples."