"At thy right hand there are pleasures for evermore." 16:11

The author of this psalm allegedly is David. If so, then it's not surprising that his "loins" would be "filled with a loathsome disease." After all, his promiscuity was legendary, and he probably didn't practice safe sex. 38:5, 7

"I was shapen in iniquity; and in sin did my mother conceive me."
Women, sex, and babies are all evil to God. 51:5