Use a home-made gravity bong on em the first time. ^^ That'll make sure they get high, even if it's their first time. Thats what I did with my g/f's first time and she was smmaasshheedd. My first three times I used a pipe and I didnt get touched. Fourth time used a bong, BOOM. From then on I could use a pipe or joint, whatev, and I could get high. ^^

E-