It is a fact of life (and anatomy) that tight leggings, exercise clothing and other such garments can leave one rather exposed, in a way sometimes likened to the hooves of a form of desert transport... Fear not! Our friends in the US have not only come up with underwear to counter this, but a whole form of 'delicate terminology' to accompany the issue.
Camelflage - the original visual privacy undergarment - knickers come in both bikini and thong cuts in black or nude. They both have an insert sewn into the gusset which smooths out the whole area.
Buy them at Camelflage.com for $19.99 (around £14)