Two Piers, Two Friends: Not Twins?

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The discussion centers around a riddle involving two friends fishing on separate piers over the Thames. Despite being born of the same mother on the same day and year, they are not twins, leading to the conclusion that they could be part of a larger multiple birth, such as triplets or octuplets. The conversation highlights the intriguing nature of the riddle and the quick engagement of participants in solving it.
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There were two piers reaching over the Thames. On each pier I spied a different friend of mine, fishing. These two friends were born of the same mother on the same day of the same year, yet they are not twins. How is that possible?
 
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Triplets, Octuplets.

Edit: Sorry, a bit harsh before =)
 
DavidSnider said:
Triplets, Octuplets.

Edit: Sorry, a bit harsh before =)

Wow you are fast :)
 

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