What movie is this? (main character's girlfriend works in art, and her main client is into animal magnetism)?

The main character is a guy whose girlfriend is an art dealer, and her
main client does this weird "animal themed" stuff. The artist is a
womanizer, and everyone comments on his animal magnetism. The main
character is always worried they will hook up, and he breaks into his
house at one point.This is maybe 3-7 years old, and the main character
is I think a well know actor. I CAN'T REMEMBER THIS FOR THE LIFE OF
ME!
(not dinner for schmucks, although steve carell is into some animal
stuff there at it is similar), In this movie, the artist dresses up
in animal type stuff and does all kinds of photo shoots and art
galleries.