What would you do if the one you have at home is as big or or bigger than the others you have seen?
Are you asking
what you do if you discover (after the fact) that the guy you're getting ready to have sex with, has a cock that is =< than your husband? If the determining factor of you having sex with another man is to have sex with a man with a larger cock than your husband's, then why not ask the man you're considering? I'm not sure how you go about choosing your men for sex, but if cock size is
that important to you having good sex, it wouldn't be impolite to ask the man what his cock size is, regardless of what color it is. Men are prone to lie about their cock sizes until actually confronted. If you think every black man on here has a huge cock, I have some oil property you might be interested in as well. Besides, the man may have some "preferences" of his own!
Penis size is obviously a personal preference
with women, but with many men, its the rule ... the larger the penis, the better the sex, and there's no convincing some guys otherwise. Extreme cock sizes, however, (whether too large or too small), can be an inconvenience, if not a down right discomfort to many women. Obviously every woman has her own comfort zone. So, you tell the man you desire a cock that's "X" in size or larger, and then ask him if he qualifies ...