lily lily:
$1:
No way you can portray a period on a gal as being happy.
All kidding aside - not every woman gets PMS, and most cycles pass fairly uneventfully.
We've been able to swim and ride bikes for decades.
Besides... I remember a couple of times as a teen that I was very happy to get my period.

Yeah, unless you are lying in your bed for 3 days, cramping, splitting headaches so you can't see straight and leaking and making a mess so you have to change 6 times a day because 'the happy period'-stuff don't do what they say they should...