Three cheers for Levi helping to break Spenny's dislike for little kids!! For whatever reason Levi got it in his head that "Spenny" sounded like "Bunny" so that is what he called Spencer all evening long!
Then when Spen flexed his oh-so-impressive muscles Levi was there to admire - which made Spencer realize that his future niece or nephew could very well end up living in awe and admiration of him - which I think made him realize that little kids can be great for boosting ones ego, so maybe they're not so bad after all.
I think Spenny's heart is melting. I think he likes kids. Just a little bit.