Why does Dongwan not want his Shinhwa members to watch his musical?

Shinhwa'sDongwanappeared onMBC's 'Park Kyung Lim's 2 O'Clock Date' on June 7 to promote his musical, 'Edgar Allen Poe.'

Park Kyung Limasked,"Did the Shinhwa members go [to see your musical]?"and he replied,"They have not.  I don't want the members to come.  The moment I see the members' face, my concentration falters.  Please do not come."

Then, he added,"Hyesungdoes come often without telling me.  In that dark audience, he puts his cap so low it pushes down on his nose and watches.  He disappears,"causing laughter.

Park Kyung Lim made a public service announcement of,"We wish that Shinhwa members would forfeit [watching] the musical this time for Dongwan's sake."