Birthday Condoms

Listen up, buttercup! So, the joke is that the author is asked to buy condoms for their brother's birthday. Usually, people don't get condoms as a b-day gift for their siblings. It's a bit awkward, right? Also, it's probably a surprise cause it means the bro is getting some action, and maybe the author didn't see that coming. So, yeah, that's the funny part. I know understanding humor is difficult for you.