A girl is wandering around at a party and notices a US Air Force General standing on his own. As she approaches him, he gives her a stern glance and carries on drinking his beer while standing stiffly to attention.
'Hey, c'mon, lighten up. It is a party, you know' says the girl
'Ah'm well aware of that, miss.' the General replied with a stern look.
The girl wanders off again, but half hour later, she sees the General still standing stiffly, not talking to anyone. She walks up to him again:
'Hey, you know your problem? You're a stuffed shirted stiff. You don't know how to have fun.'
'Ah assure you, miss, I know how to have fun.'
'Ok then, when was the last time you had sex?'
'1957, not that it's any of your business.'
'1957! But that's ages ago. I thought you said you knew how to have fun.'
'I sure do miss - it's only 2215 now.'