Son: Dad, will you remember me in 5 years?
Dad: Yes.

Son: 1 year?
Dad: Yes.

Son: 6 months?
Dad: Yes.

Son: 1 month?
Dad: Yes

Son 1 week?
Dad: Yes.

Son: 5 days?
Dad: Yes.

Son: 5 hours?
Dad: Yes.

Son: 1 hour?
Dad: Yes.

Son: 30 minutes?
Dad: Yes.

Son: 1 minute?
Dad: Yes.

Son: 1 second?
Dad: Yes.

Son: Knock Knock
Dad: Who's there?
Son: See, you forgot me already!!!