If nither my husband and I have any std's why is there a fishy smell that stays around us after geting intimit?

Gardnerella. Semen is a growth medium for gardnerella bacteria which have a distinctive fishy smell due to a chemical they produce when they stand. Don't worry about it. Gardnerella itself can cause vaginitis but it is not a sexually tansmitted disease. The bugs are common on the normal body in the genital area. Glad you asked -- enjoy the romance and wash up as needed!