My brother (whose gf goes to highschool with me) always asks me at the dinner table, in front of his girlfriend "So, when you gonna hit puberty? You gotta go get it, it's not like it's just gonna come to you"
Normally i just shake it off with a smile. But sometimes it gets too bad. My brothers accuse me in front of my parents of stealing their condoms (which i don't, of course) and then they say they saw me walking around the house with a condom on, which i don't do. They just try to make life as hell-like as possible.
They both hit puberty in 7th grade, so it's easy for them to joke about >_>