"X" rated?

there was a class where the teacher was doing a survey on sex. he asked the class "how many of you have sex once a week?" well, one guy was just sittin' there grinning his face off but didn't raise his hand. others did.

then the teacher asked "how many of you have sex once a month?" more hands but not the guy that was actually squirming in his seat he was so happy.

then the teacher asked the class...every 3 months, then every 6 months. still no response from that one guy. the teacher was looking puzzled now but finally asked "how many of you have sex once a year?"

well, finally, the guy raised his hands, waiving them in the air and yelled "me! me!" well, the teacher asked him "if you have sex only once a year, why are you so happy?"

to which the guy replied "Tonight's The Night!!!"