There are sites with sissy assignments hidden all over the internet. Sissy Station is probably the most prominent, but there are an awful lot of forums where you can request simple assignments.
But today I have just one simple one for you (if your girly personality is old enough). Get a shot glass and follow the instructions in this video (or download it from here). Follow them to the letter.
If you don't know what ruining an orgasm is: if you stop jerking or rubbing your clitty an instant before you cum you'll still cum, but it will just sort of flow out and you're usually still horny.
The Sissy Spot has had its 1,000 visitor yesterday. Thanks for visiting, sissies!
(I think that puts our comment/reaction-to-visitor ratio at about 1:1000 :D)