I don't understand why some guys get self-conscious when they buy condoms. I don't get embarrassed when I buy condoms. I get embarrassed when I throw them out after they expire.

The joke pivots on a common social anxiety—being judged for buying condoms—then reverses it. The speaker claims confidence at the point of purchase, but feels embarrassment later when discarding expired condoms, implying they went unused for so long that they became obsolete. The humor comes from the contrast between expected shame (sexual activity) and the punchline’s implied lack of sexual opportunity or follow-through. It also satirizes performative masculinity: the public act of buying protection can signal sexual competence, while the private evidence of expiration suggests the opposite. The line uses self-deprecation to deflate stigma and expose how insecurity often attaches to imagined social narratives rather than practical behavior.