i was getting a physical for school when i was sixteen. my sister and i usd the same doctor which happened to be a woman. i drove over there for my physcial and waited for her. she was older and not at all attractive but i was still nervous about her seeingg me naked. she came in and started doing the basic stuff like reflex tests and checking my blodd pressure. then she asked me to pull down my pants. she turned around to put on gloves and i pulled down my boxers. i didnt think it would be too bad but as soon as she turned around i got an erection. she didnt seem to react to it but i was embarrassed since id never been naked in front of a woman let alone had an erection. i was trying not too think about it but i couldnt help but flinch when she grabbed my balls. she told me it was alright and not too be nervous. i guess she didnt want to startle me or something because she took forever to grab me again and all the while i was still at full salute. finally she eased her way back and started to check me. the problem was it felt really good and the top of her hand was rubbing my penis. i felt myself starting to lose it but before i could say anything i came right on the floor in front of her. she seemed pretty surprised and said i could put my pants back on. i left as fast as i could humiliated.