( This ( ( ( ( ( ( may not ) ( sound ( very sexy ) ) ) , ) but ) ( remember ( that ( ( ( the essence ) ( of ( sexual reproduction ) ) ) ( is ( ( forming ( a ( new organism ) ) ) ( from ( ( the ( combined ( genetic material ) ) ) ( of parents ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT This)) (VP (VP (MD may) (RB not) (VP (VB sound) (ADJP (RB very) (JJ sexy)))) (, ,) (CC but) (VP (VBP remember) (SBAR (IN that) (S (NP (NP (DT the) (NN essence)) (PP (IN of) (NP (JJ sexual) (NN reproduction)))) (VP (VBZ is) (VP (VBG forming) (NP (DT a) (JJ new) (NN organism)) (PP (IN from) (NP (NP (DT the) (VBN combined) (JJ genetic) (NN material)) (PP (IN of) (NP (NNS parents))))))))))) (. .)))
This may not sound very sexy, but remember that the essence of sexual reproduction is forming a new organism from the combined genetic material of  parents.
(ROOT (S (NP (JJ Sexual) (NN reproduction)) (VP (VBZ involves) (S (VP (VBG combining) (NP (JJ genetic) (NN material)) (PP (IN from) (NP (CD two) (NNS parents))) (S (VP (TO to) (VP (VB create) (NP (JJ distinct) (NN offspring)))))))) (. .)))