a Sticky envelope is when you can't be fucked to lick the envelope to send it so u squeeze out a little bit on nut and seal ur envelope with ur own fucking seman.
person 1: Bruh that's one sticky envelope person 2: yeah idk why tbh (smirks)
a free condom is where u tie up ur foreskin with an elastic band so when u go to fuck a chick u won't nut
bruh who buys condoms just tie ur foreskin up it's a free condom