Erection just by holding a girl's hand?
Hey everyone...I was wondering if getting an erection just by holding a girl's hand is normal at all. I am 19 years old, will be 20 in August. I am still a virgin by choice. My previous girlfriends offered me sex before but I felt that I was too young to have sex. Anyway, I was at work and out of nowhere as a joke a girl I work with held my hand. We have known each other for about 2 years and we were kidding around, but I felt as soon as she touched my hand I was starting to get an erection. I let go before it became really obvious. My question is, why would that happen? I have held a girl's hand before, but only got an erection when we would kiss or she would sit on my lap. Also she is coming over tomorrow night, so what should I do? If I get another erection what should I do, since she'll be at my house and I can't just leave. Do you think she'd be offended if she saw me have one when she was over? I know this is odd, but that just shows you how sheltered I have been. I just feel way different about her than my other girlfriends and were not even dating. Any help would be greatly appreciated.
Girls, would that offend you, and guys does this happen to you often too?