This is what you have friends-with-benefits for, right?
Just for the record, Ashley and Muffin have done lewd couple things, but not very successfully. Belly rubs put Muffin in a better blissful mood than sex anyway. Just look at him!
Drawing Muffin shirtless is always a weird struggle. He's a noodle, he's lanky! But he's usually got some guilty pudge on him from his monumental amount of Mammal Crackers he eats and the odd bunny~ It's very rare for him to have worked out a little to get a flat tum like this! Barely any pudge. Gonna have to fix that