`  ::To anonymous and Albert both:  ``How can they`` is just like everybody else.  Asexuality is not a physiological inability to have sex.  ``Why do they`` is more complex, and delves into questions of social pressure, having romantic relationships in a society that defines intimacy through sex, and yes, in some cases procreationI think we can all agree that the human desires for sex and for children are somewhat divorced from each other.  Many asexual people do have or want children.  Speaking of that troublesome ``many,`` the statement ``many asexuals do have sex`` was likely written by someone within the asexual community speaking from an internal point of view.  Many of the asexual people on the AVEN messageboard have had or are in sexual relationships, for example, though internet forum discussions are clearly not citable sources.  Note, ``many`` does not mean ``most`` or ``all.``  Anwyay, I'm sure the topic's been covered in some of the scientific literature or media pieces, so I'll see if I can find something to source that statement.  `