How could you possibly be offended by a guy getting aroused by kissing you? It's not like we can really control the erection process at ALL... and as I'm sure you know being aroused isn't synonomous with jumping someone. My first girlfriend and I never went beyond kissing, and practically every time she TOUCHED me I popped an erection. Believe it or not, people DO have self control and don't go around trying to have sex with everything constantly.