elocomotive
A useful idiot.
In dance communities in general, dancing with siblings is pretty common, since it's treated no different as, for example, playing catch or whatever.
Either....
(1) @Darkstone42 just has a very mature view and understands that what can be a sexual expression for some does not have to be that for everyone OR...
(2) He needs to point out on the doll where his Little League coach touched him.