*1/2 That’s My Boy As a Somerville middle school kid, Donny scores with his teacher, gets her pregnant, and raises a son. Now all grown up, the adult loser-doofus Donny (Adam Sandler) tracks down his estranged adult son (Andy Samberg) on the eve of his wedding. Cue the family reunion and Val Halen-infused soundtrack. Full of wooden writing, stereotypes, and bodily fluids, “That’s My Boy” is more raunch-fest than comedy. (114 min., R) (Ethan Gilsdorf)
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