SHAUN CASSIDY—Wasp (Warner Bros.):: As Shaun lurches into musical manhood via the rather bold move of Wasp, maybe it’s time some kindly father figure sat him down and explained the facts of life, namely the Mickey Rooney Syndrome: no matter how grown-up you appear, most people have you pegged as a Hardy Boy for life. As it happened, though, Mr. Cassidy was actually taken in hand by Todd Rundgren, the will-adolescence-never-end? J.D. Salinger of rock, for this excursion into the scary world of adult pop. Rundgren presumably selected all the, oddball oldies (the Animals’ “It’s My Life,” etc.), besides generously furnishing his Utopia to back young Cassidy’s vocals. (Which tend, to be cold and vaguely Bowiesque, to keep the child-actor baiters at a safe distance.) And the album works, on some bizarre level or another, but damned if I know what it is. No, wait, I got it! He’s better looking than Travolta! R.R