When Theseus peruses the List of possible entertainments, which one catches his eye and why? Act 5

Theseus has Egeus read him a list of possible performances, and Theseus finally settles on 'A tedious brief scene of young Pyramus and his love Thisbe: very tragical mirth' as the play he wants to see performed. Egeus tries to dissuade him, telling him that the actors are workingmen will no talent, but Theseus is adamant that he watch them perform. Theseus likes the contradiction in the title:

That is hot ice and wondrous strange snow. How shall we find the concord of this discord?