It's easy to define altruism out of existence by stipulating that all reasons to act are 'selfish'. The practice has a fairly long history but doesn't seem very useful.
Even if all our acts are done because we get some satisfaction out of doing them, there is a big difference between a person who can get satisfaction out of bringing pleasure to other people and a person who can only get satisfaction from bringing pleasure to him or herself.

When Ayn Rand began an affair with her student, Nathaniel Brandon, she said to her husband and Brandon's wife," If the four of us were lesser people, it could never have happened and you could never accept it. But we're not lesser people."
This strikes me a selfish attempt to get other people to consent to her plan. Nothing particularly noble about it.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13