Can Sudden unexpected exposur to explicite sex act casue trauma?

After marriage in1969 though I had pornographic exposure in form of in ups,in 1978 after giving birth to three suns in 1970, 1971 &1973,I encounter encounter explicite exposur I devlope Lucoderma.Is it connecteded to each other.My one sister is having Lucoderma.How I can get rea of it. I am 72 year old but my sex drive is not reduced but increasing.I have no other medical complication. No b.p. ,diabetics,any heart trouble,I do not smock, drink alcohole.Wt.53kg H5'2"

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