The secret is keeping yourself without cum for as long as possible. In my first sissygasm I was on the 7th grade and didn't cum for 12 days. In five minutes being pounded in the ass I came handsfree a huuuuge load. Today I leak just thinking about cock, but in the beginning you can try celibate until get used to it. Believe me: worth every day you kept yourself without cum. You feel very girly and got. After those several days without cum, tell top to suck your titties and ass while you wear girl clothes, like panties or a dress. You WILL cum handsfree, there's no doubt, trust me