My Cock + Your Pussy = Good Times T-Shirt

My Cock + Your Pussy = Good Times! Finally an interesting math equation for a change.
In fact, this is the equation Matt Damon solved in Good Will Hunting.

Short-Sleeve Unisex T-Shirt
• 100% ring-spun cotton
• Sport Grey is 90% ring-spun cotton, 10% polyester
• Dark Heather is 65% polyester, 35% cotton
• 4.5 oz/yd² (153 g/m²)
• Shoulder-to-shoulder taping
• Quarter-turned to avoid crease down the center
• Blank product sourced from Bangladesh, Nicaragua, Honduras, Dominican Republic, Haiti or Guatemala