(Strip Number 847, Original Publication Date, 6 May 1985)
Panel 1: As he and Michael walk down Main Street, Lawrence asks him what he's gonna get Elly for Mother's Day. Mike hasn't a clue.
Panel 2: Lawrence boasts that he's gonna get HIS mom flowers.
Panel 3: This appalls Mike because a virile dude like him wouldn't get his mom something wimpy and conducive to being kissed and being called cute and a whole crap-load of other things boys his age want to avoid like flowers.
Panel 4: Lawrence smirks that that's because Mike's a chicken.
Summary: I should think that it's less that a gobsmacked Mike doesn't want to look like a chicken and more that he doesn't need a reminder that he's a panicky idiot getting guilted into buying something that he doesn't have to put a lot of thought into. The hand-made card or nice gesture would require genuine effort but a bouquet that'll be tossed by the May Two-Four doesn't tax brain cells at all that I've noticed.