Hello, My girlfriend and I usually dry hump until I ejaculate with my underwear and shorts on and she also has clothing on. I usually change my clothing and then we snuggle, a few times the wetness in my underwear graced my leg as I was removing my clothing. If my girlfriend happens to touch that area where the underwear touched, and she touches her vagina, could she be pregnant? Also, does seman go through boxer shorts? I know that when a sperm cell fertilizes an egg, a woman can get pregnant, but what does it actually take?