Just what is the implication here?..
my answer: Bigger than your women are used to, little man.
Insulting and mocking leftists is the way to go. A remarkable amount of leftism is nothing more than size envy, not just the size of your gun, but soft drink, hamburger, salt shaker, family, car, house. Envy is a side effect of vanity. Leftists are extremely vulnerable to insults, but conservatives are often too polite to use them.