MARK SHIELDS wholeheartedly supports same-sex weddings — so much so that he spent six years working at the Human Rights Campaign, where marriage equality is front and center. But please, pretty please, don’t invite him to another one.

“The equality people will have a fit about this, but I’ll say it anyway: I have gay-wedding burnout,” Mr. Shields, 35, said one day this spring. “I spent my 20s going to weddings, being in weddings, shopping for weddings, helping to plan weddings. In my early 30s they finally started tapering off, and I was like, ‘Oh, thank God, we’re over the hump.’ ”

He paused for dramatic effect. “Nope. Here come the Gays.”

Be careful what you wish for? The legalization of same-sex marriage in a few states and the District of Columbia — and now at its one-year mark in New York — has resulted in a gay wedding boom, the natural outcome of decades of pent-up demand. And even hardhearted gay men (like me) are thrilled that the happy couples finally have their chance to say “I do.” Finally!

But some unexpected emotions are also bubbling up as the invitations roll in: puzzlement (I don’t know you that well), concern (can I afford another cross-country trip?), dread (not another one, please). At the same time, there is a lack of surprise. Watching straight friends from high school or college marry as they stagger into adulthood (two or three couples a year, some in their 20s and some in their 30s or older) is thrilling in a way that a near-simultaneous stampede of same-sex couples to the altar is not.