The Muppets star revealed that he wanted to do a tribute to Forgetting Sarah Marshall, in which he memorably dropped his towel in front of co-star Kristen Bell when she broke up with him.
"I thought of it at the time as an homage to Sarah Marshall, but then when we saw it, it just seemed gratuitous," Segel said at the film's premiere on Wednesday (April 18).
"There's no need for it," he continued. "People already know what it looks like, and we also couldn't find a lens that was wide enough."
Segel recently confirmed his romance with Michelle Williams. The two were first reported to be involved after they were spotted on a stroll last month.
The actor has said that Forgetting Sarah Marshall fans still ask him to expose himself in public.
Watch the trailer for The Five Year Engagement below: