Like Father, Like Son starring THE LORD OF THE RINGS GUY

In the summer of 1989, while held captive at a sleepover, I saw -- nay, witnessed -- the film "Like Father, Like Son."  The movie actually came out in 1987. But watching at that sleepover, it seemed like it was brand-new. So ahead-of-its-time was this movie, that it was able to transcend its origins and appear to be from 2 years in the future. The 1987 filmmakers nailed what life would be like in 1989 so well, I was floored.
For serious, it's a goofy movie about a workaholic single father (Dudley Moore) and his son (Kirk Cameron) switching bodies. Hi jinx occur and, at the end, they switch bodies back and everyone has a closer relationship with eachother, while Dad also gets a new hot girlfriend.
Variations on this formula seemed to be all the rage in the late 1980s, in movies like Big (Tom Hanks), 18 Again (Charlie Schlatter and George Burns, and named after an old Burns musical number), Vice Versa (Judge Reinhold and Fred Savage) and The Last Emperor (zzzzz).
Back to LFLS (as my inner-thigh tattoo calls it), the movie looks good on paper.
Writer David Hoselton seems to have worked on the movie with two guys who subsequently went into Witness Protection (while Hoselton wrote/produced "House"). Director Rod Daniel was fresh off WKRP and "Teen Wolf."
Dudley Moore is a comic legend, and Cameron does a passable job (and was riding high thanks to the terrible "Growing Pains," from two latter-day WKRP writers).
The movie also features soap star Margaret Colin, Catherine Hicks (who would destroy the WB along with Christianity on "7th Heaven"),  Michael Horton (Jessica Fletcher's nephew on "Murder, She Wrote"), character actress Maxine Stuart, the always gruff Patrick O'Neal, Larry Sellers (the "weird, naked Indian" from Wayne's World II) and... SEAN ASTIN.  Yes, Rudy aka Samwise plays the goofy best friend in LFLS.
How's the movie? Fine. Not the horrendous abomination Siskel & Ebert (or even the bitter, aged Rod Daniel) would have you believe, but also not even as good as a below-average episode of "King of Queens" or some other middling sitcom.
There are a couple scenes worth watching, though, wherein Dudley Moore shows glimpses of his former brilliance (at this point, he was battling booze and early MS).
One is below.... his hilariously inept seduction of a colleague's wife. Keep in mind this is after the switch, so Moore is playing a 17-year-old...

The music in that scene (compete with monkey sounds) always slays me. If anyone knows what it is, please comment!

In my search for that music, I found the entire soundtrack to LFLS, including another distinctive tune.
There's a scene earlier in the film at a bar, and the song in the background is "I Ching" by Marc Jordan. It's quintessential '80s. Enjoy.
Marc Jordan, by the way, has had some chart hits in his native Canada, and also seen much more success writing tunes for other artists (like Diana Ross and Rod Stewart, who are currently slated for a UFC matchup next month).