Recreational drug use jokes

Jack and Jill went up the hill to smoke some marijuana.

Jack got high and grabbed Jill's thigh and said, "You know you wanna."

Jill said yes and lifted her dress so they could have some fun, but stupid Jill forgot her pill, and now they have a son.

What is the highest number?

420.

Can't have a smoke with my girl after sex, she's asthmatic.

Plus, she's too young to smoke.