For some Ageplay folks, their healthy adult sexuality is mingled with their Innerkid needs. The inclusion of physical intimacies, or sexuality, in an Adult Ageplay relationship, is referred to as Intimate Ageplay, where the Innerkid has sexual interactions with her Guardian.
Some couples posit the expression of this healthy sexuality as educating or training the Innergirl, if her emotional needs include feeling as innocent as a Biokid of that age ought to be.
Others find fulfillment from allowing her Innergirl to simply be as sexual as her Bigperson is, adding that element to interactions with her Guardian.
As always, physical intimacy and sexuality here ALWAYS refers to an Innergirl, who is, of course, biologically an adult -- NEVER to a Biokid, who is biologically an actual child.