Note that ותצחק (VaTiZXkaQ) and she laughing, and hence the name of Isaac (יצחק) IZXkaQ = piel he-collective-laughing = he-funny = he-hilarious.
Piel is said to be "intensive", which includes collective-action. E.g, he-kills
-> he-intensive-kills = he murders
-> he-collective-kills = he slaughters.[עדנה] EDNH her-make-pleasure = feminine stative = English participle pleasuring.
Note that [עדנה] EDNH is from [עדנ = עדן] EDeN .
Pleasure is correlated to the Garden of Eden. And apparently, so is sex.
But [עדן] ADN is also the root word for ADoN lord. SoSo [גן עדן] GaN ADoN = Garden of Lord = Garden of pleasure. The Bible is allowing sex to be correlated to the presence of the LORD !! So to deprive oneself of sex, is to deprive ourselves of yet another dimension of the presence of G'd. Poor monks/nuns, they are missing out on one of the dimensions of the presence of G'd.