Doctor Who, First Doctor/Second Doctor/Third Doctor/Fourth Doctor/Fifth Doctor/Sixth Doctor/Seventh Doctor/Eighth Doctor/Ninth Doctor/Tenth Doctor/Eleventh Doctor, 100 words, mature, not mine. How NOT to cause a paradox. CRACK!
"We shouldn't," the Doctor's lanky tenth incarnation says.
"It could cause a paradox," his blond fifth self agrees.
"There are things that we could do without touching," says the one with the umbrella. The silver-haired regeneration pulls his cock out of velvet trousers. The gangly version with the bowtie grins, and undoes his own zip. That earns a grin from the Doctor with the bowl-cut and an insouciant shrug from the one in the patchwork coat.
His eighth self nervously undoes his cravat; his fourth doesn't even bother unwrapping his scarf. His first grins broadly at the one in leather.