No it was gas because you washed your legs all over because you did it in shorts.
( ( No it ) ( ( ( was gas ) ( because ( you ( ( ( washed ( your legs ) ) ( all over ) ) ( because ( you ( ( did it ) ( in shorts ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT No) (PRP it)) (VP (VBD was) (NP (NN gas)) (SBAR (IN because) (S (NP (PRP you)) (VP (VBD washed) (NP (PRP$ your) (NNS legs)) (ADVP (DT all) (RP over)) (SBAR (IN because) (S (NP (PRP you)) (VP (VBD did) (NP (PRP it)) (PP (IN in) (NP (NNS shorts)))))))))) (. .)))
Your legs were left exactly as they were before after wearing jeans. 
( ( Your legs ) ( ( were ( ( left exactly ) ( as ( they ( were ( before ( after ( wearing jeans ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP$ Your) (NNS legs)) (VP (VBD were) (VP (VBN left) (ADVP (RB exactly)) (SBAR (IN as) (S (NP (PRP they)) (VP (VBD were) (PP (RB before) (IN after) (S (VP (VBG wearing) (NP (NNS jeans)))))))))) (. .)))