Your penis gets hard because 1. Its erectioned, and 2. You are next to a girl you like, giving your hormones the want to have sex. Also, a male’s penis will enlargen and harden when having sex, orgasms, or when you think about something perverted, sexual, or friendily. It is a very easily-contained process.
June 29, 2009 | 
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its called an erection
you were aroused
its normal
what else do you want me to tell you?
Your penis gets hard because 1. Its erectioned, and 2. You are next to a girl you like, giving your hormones the want to have sex. Also, a male’s penis will enlargen and harden when having sex, orgasms, or when you think about something perverted, sexual, or friendily. It is a very easily-contained process.
It is a normal erection of the penis to enable penetration of a vagina. A normal reaction for a healthy male with an attractive female.
It’s called an erection, it happens when you get sexually aroused or even from the friction of something rubbing against it.
it wont stop really. you liked her sitting on your lap. so you got to fight the urge so you dont get hard. good luck.
Dude its called an erection. how old are you? Didnt you have a talk with your parents about sex?
just bend her over next time and stick it in her