Why on earth would he hitch his dreamy weird wagon to Bebe Buell?

Because he is her father. Bebe Buell is full of shit.

I don’t think he claimed paternity. But he did act as her father and raised her.

Is it any of our business?

Did you try asking him?

Why did John Astin raise Sean as his son?

Because Gary talked Desi Jr. out of it.

He wrote about this in his autobiography. He didn't think Steven Tyler (or Bebe Buell, for that matter) were fit parents.

R3, R5, and R9 speak the truth… it’s because he’s a mensch who saw that an innocent kid was at risk of ending up in a very bad situation with no responsible parental figures. So he took it upon himself to be Liv’s “father” and she was damned lucky he did.

I think she's tremendous.

she appears to have been very lucky.....and has expressed as much, i believe. so many horror stories from that era. I would assume it has only made Todd a better person.