I think you guys will be very interested. Saw this article in
Woman's World August edition:
Aerobics has a new erotic Japanese variation. And it's for men
only. Introducing Onanibics, which requires one to masturbate for
at least 25 mins before ejaculation occurs in order to lose
weight.
("Onani" is a common Japanese term for masturbation and it refers
to a biblical figure named Onan who was destroyed for "spilling his
seed on the ground".)
"Ejaculation raises the basic metabolism of muscles and consumes
calories," says Dr Hideo Yamanaka on http://mdn.mainichi.co.jp/waiwai. But for effective
weight loss, it would take an ordinary young man to masturbate more
than 100 times a month! And that works out ot be about three times
a day!
For those who think it's too much, the doctor would have you think
otherwise. He says,"Actually, more like four or five (times), if
you're really serious. For each two kilos of body weight, you'd
need to squeeze out two litres of semen."
It has been claimed that "guys who made their motto as 'At least
one good tug a day' have managed to lose as much as four
kilogrammes in a week"! In one case, a 55-year-old Japanese writer
who weighs 100kg took it upon himself to try out the new exercise
regime by hitting the red-light districts for some erm...
'assistance' at a porno video parlour, a peep show, etc. He chalked
up a total of four hours of sexual activities that amounted to
43,8100 yen (S$690), including consumption tax. For all that
'intensive workout', he lost just about two kilogrammes.
So next time you can tell your gf/wife that they need to give
you sex if they want you to lose weight. Haha 
