Translation:We love to watch people run a marathon.
It so fun to see people torture themselves while we are drinking something fresh...
This is one of the more obscure rules of English, which I'll just state very compactly: the third verb in a phrase cannot be a gerund, but needs to stay infinitive.
"I love watching kittens fall over". Or "I love to watch kittens fall over." But not "I love watching kittens falling over."
In English, it sounds more natural to say We love to watch people run marathons.
Do all verbs that come after a conjugated verb have to be in the infinitive? I would have thought that 'lobe' would be conjugated
For each clause there is only one verb that gets conjugated. All others remain in the infinitive (or a participle) form. This is pretty unapparent in English since there's barely any conjugation left in that language.